From fb870c9977f852e88787f92ca8cd769b93963fd9 Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Fri, 23 Sep 2022 16:08:24 +0800
Subject: [PATCH 01/12] fixed wildcard compound cols, ratios, etc.

---
 build.py                     |  2 +-
 engine/types.py              | 17 +++++++++----
 engine/utils.py              |  4 ++++
 prompt.py                    |  4 ++--
 reconstruct/ast.py           | 46 +++++++++++++++++++++++++-----------
 reconstruct/expr.py          |  9 +++----
 reconstruct/new_expr.py      |  4 ++--
 sdk/aquery.h                 |  5 ++++
 server/aggregations.h        | 34 ++++++++++++++++++++++++++
 server/table.h               |  1 +
 server/table_ext_monetdb.hpp |  4 ++--
 server/types.h               | 29 +++++++++++++++++++++--
 tests/best_profit.a          |  3 +--
 13 files changed, 129 insertions(+), 33 deletions(-)

diff --git a/build.py b/build.py
index 3312a0b..aa10a7a 100644
--- a/build.py
+++ b/build.py
@@ -69,7 +69,7 @@ class checksums:
         
 class build_manager:
     sourcefiles = [
-                   'build.py', 
+                   'build.py', 'Makefile',
                    'server/server.cpp', 'server/io.cpp',  
                    'server/monetdb_conn.cpp', 'server/threading.cpp',
                    'server/winhelper.cpp'
diff --git a/engine/types.py b/engine/types.py
index 3083795..6e49eea 100644
--- a/engine/types.py
+++ b/engine/types.py
@@ -106,7 +106,9 @@ ULongT = Types(8, name = 'uint64', sqlname = 'UINT64', fp_type=DoubleT)
 UIntT = Types(7, name = 'uint32', sqlname = 'UINT32', long_type=ULongT, fp_type=FloatT)
 UShortT = Types(6, name = 'uint16', sqlname = 'UINT16', long_type=ULongT, fp_type=FloatT)
 UByteT = Types(5, name = 'uint8', sqlname = 'UINT8', long_type=ULongT, fp_type=FloatT)
-StrT = Types(200, name = 'str', cname = 'const char*', sqlname='VARCHAR', ctype_name = 'types::ASTR')
+StrT = Types(200, name = 'str', cname = 'const char*', sqlname='TEXT', ctype_name = 'types::ASTR')
+TextT = Types(200, name = 'text', cname = 'const char*', sqlname='TEXT', ctype_name = 'types::ASTR')
+VarcharT = Types(200, name = 'varchar', cname = 'const char*', sqlname='VARCHAR', ctype_name = 'types::ASTR')
 VoidT = Types(200, name = 'void', cname = 'void', sqlname='Null', ctype_name = 'types::None')
 
 class VectorT(Types):
@@ -138,7 +140,10 @@ int_types : Dict[str, Types] = _ty_make_dict('t.sqlname.lower()', LongT, ByteT,
 uint_types : Dict[str, Types] = _ty_make_dict('t.sqlname.lower()', ULongT, UByteT, UShortT, UIntT)
 fp_types : Dict[str, Types] = _ty_make_dict('t.sqlname.lower()', FloatT, DoubleT)
 temporal_types : Dict[str, Types] = _ty_make_dict('t.sqlname.lower()', DateT, TimeT, TimeStampT)
-builtin_types : Dict[str, Types] = {**_ty_make_dict('t.sqlname.lower()', AnyT, StrT), **int_types, **fp_types, **temporal_types}
+builtin_types : Dict[str, Types] = {
+    'string' : StrT,
+    **_ty_make_dict('t.sqlname.lower()', AnyT, TextT, VarcharT),
+    **int_types, **fp_types, **temporal_types}
 
 def get_int128_support():
     for t in int_types.values():
@@ -267,7 +272,9 @@ def windowed_fn_behavor(op: OperatorBase, c_code, *x):
     
 # arithmetic 
 opadd = OperatorBase('add', 2, auto_extension, cname = '+', sqlname = '+', call = binary_op_behavior)
-opdiv = OperatorBase('div', 2, fp(auto_extension), cname = '/', sqlname = '/', call = binary_op_behavior)
+# monetdb wont extend int division to fp type
+# opdiv = OperatorBase('div', 2, fp(auto_extension), cname = '/', sqlname = '/', call = binary_op_behavior)
+opdiv = OperatorBase('div', 2, auto_extension, cname = '/', sqlname = '/', call = binary_op_behavior)
 opmul = OperatorBase('mul', 2, fp(auto_extension), cname = '*', sqlname = '*', call = binary_op_behavior)
 opsub = OperatorBase('sub', 2, auto_extension, cname = '-', sqlname = '-', call = binary_op_behavior)
 opmod = OperatorBase('mod', 2, auto_extension_int, cname = '%', sqlname = '%', call = binary_op_behavior)
@@ -288,7 +295,9 @@ opdistinct = OperatorBase('distinct', 1, as_is, cname = '.distinct()', sqlname =
 fnmax = OperatorBase('max', 1, as_is, cname = 'max', sqlname = 'MAX', call = fn_behavior)
 fnmin = OperatorBase('min', 1, as_is, cname = 'min', sqlname = 'MIN', call = fn_behavior)
 fndeltas = OperatorBase('deltas', 1, as_is, cname = 'deltas', sqlname = 'DELTAS', call = fn_behavior)
+fnratios = OperatorBase('ratios', [1, 2], fp(ty_clamp(as_is, -1)), cname = 'ratios', sqlname = 'RATIOS', call = windowed_fn_behavor)
 fnlast = OperatorBase('last', 1, as_is, cname = 'last', sqlname = 'LAST', call = fn_behavior)
+fnfirst = OperatorBase('first', 1, as_is, cname = 'frist', sqlname = 'FRIST', call = fn_behavior)
 #fnsum = OperatorBase('sum', 1, ext(auto_extension), cname = 'sum', sqlname = 'SUM', call = fn_behavior)
 #fnavg = OperatorBase('avg', 1, fp(ext(auto_extension)), cname = 'avg', sqlname = 'AVG', call = fn_behavior)
 fnsum = OperatorBase('sum', 1, long_return, cname = 'sum', sqlname = 'SUM', call = fn_behavior)
@@ -324,7 +333,7 @@ builtin_unary_logical = _op_make_dict(opnot)
 builtin_unary_arith = _op_make_dict(opneg)
 builtin_unary_special = _op_make_dict(spnull, opdistinct)
 builtin_cstdlib = _op_make_dict(fnsqrt, fnlog, fnsin, fncos, fntan, fnpow)
-builtin_func = _op_make_dict(fnmax, fnmin, fnsum, fnavg, fnmaxs, fnmins, fndeltas, fnlast, fnsums, fnavgs, fncnt)
+builtin_func = _op_make_dict(fnmax, fnmin, fnsum, fnavg, fnmaxs, fnmins, fndeltas, fnratios, fnlast, fnfirst, fnsums, fnavgs, fncnt)
 user_module_func = {}
 builtin_operators : Dict[str, OperatorBase] = {**builtin_binary_arith, **builtin_binary_logical, 
     **builtin_unary_arith, **builtin_unary_logical, **builtin_unary_special, **builtin_func, **builtin_cstdlib, 
diff --git a/engine/utils.py b/engine/utils.py
index 1a8b403..995d354 100644
--- a/engine/utils.py
+++ b/engine/utils.py
@@ -137,3 +137,7 @@ def add_dll_dir(dll: str):
         os.environ['PATH'] = os.path.abspath(dll) + os.pathsep + os.environ['PATH']
         
 nullstream = open(os.devnull, 'w')
+
+
+def clamp(val, minval, maxval):
+    return min(max(val, minval), maxval)
\ No newline at end of file
diff --git a/prompt.py b/prompt.py
index 0f59d33..91fbbe2 100644
--- a/prompt.py
+++ b/prompt.py
@@ -29,7 +29,7 @@ prompt_help = '''\
 ******** AQuery Prompt Help *********
 
 help:
-    print out this message
+    print this help message
 help commandline:
     print help message for AQuery Commandline
 <sql statement>: 
@@ -420,7 +420,7 @@ def prompt(running = lambda:True, next = lambda:input('> '), state = None):
                 continue
             elif q == 'format' or q == 'fmt':
                 subprocess.call(['clang-format', 'out.cpp'])
-            elif q == 'exit':
+            elif q == 'exit' or q == 'exit()':
                 rm(state)
                 exit()
             elif q == 'r': # build and run
diff --git a/reconstruct/ast.py b/reconstruct/ast.py
index d6293c4..6ed4e63 100644
--- a/reconstruct/ast.py
+++ b/reconstruct/ast.py
@@ -133,7 +133,7 @@ class projection(ast_node):
                 sql_expr = expr(self, e, c_code=False)
                 this_type = proj_expr.type
                 name = proj_expr.sql
-                compound = True # compound column
+                compound = [proj_expr.is_compound > 1] # compound column
                 proj_expr.cols_mentioned = self.datasource.rec
                 alias = ''
                 if 'name' in proj: # renaming column by AS keyword
@@ -142,23 +142,28 @@ class projection(ast_node):
                 if not proj_expr.is_special:
                     if proj_expr.node == '*':
                         name = [c.get_full_name() for c in self.datasource.rec]
+                        this_type = [c.type for c in self.datasource.rec]
+                        compound = [c.compound for c in self.datasource.rec]
+                        proj_expr = [expr(self, c.name) for c in self.datasource.rec]
                     else:
                         y = lambda x:x
                         count = lambda : 'count(*)'
                         name = enlist(sql_expr.eval(False, y, count=count))
-                    for n in name:
+                        this_type = enlist(this_type)
+                        proj_expr = enlist(proj_expr)
+                    for t, n, pexpr in zip(this_type, name, proj_expr):
                         offset = len(col_exprs)
                         if n not in self.var_table:
                             self.var_table[n] = offset
-                            if proj_expr.is_ColExpr and type(proj_expr.raw_col) is ColRef:
-                                for _alias in (proj_expr.raw_col.table.alias):
+                            if pexpr.is_ColExpr and type(pexpr.raw_col) is ColRef:
+                                for _alias in (pexpr.raw_col.table.alias):
                                     self.var_table[f'{_alias}.'+n] = offset
-                        proj_map[i] = [this_type, offset, proj_expr]
+                        proj_map[i] = [t, offset, pexpr]
                         col_expr = n + ' AS ' + alias if alias else n
                         if alias:
                             self.var_table[alias] = offset
                             
-                        col_exprs.append((col_expr, proj_expr.type))
+                        col_exprs.append((col_expr, t))
                         i += 1
                 else:
                     self.context.headers.add('"./server/aggregations.h"')
@@ -169,7 +174,8 @@ class projection(ast_node):
                     i += 1
                 name = enlist(name)
                 disp_name = [get_legal_name(alias if alias else n) for n in name]
-               
+                this_type = enlist(this_type)
+                
             elif type(proj) is str:
                 col = self.datasource.get_col(proj)
                 this_type = col.type
@@ -178,8 +184,8 @@ class projection(ast_node):
                 # name = col.name
             self.datasource.rec = None
             # TODO: Type deduction in Python
-            for n in disp_name:
-                cols.append(ColRef(this_type, self.out_table, None, n, len(cols), compound=compound))
+            for t, n, c in zip(this_type, disp_name, compound):
+                cols.append(ColRef(t, self.out_table, None, n, len(cols), compound=c))
         
         self.out_table.add_cols(cols, new = False)
         
@@ -213,7 +219,7 @@ class projection(ast_node):
             self.add(self.group_node.sql)
 
         if self.col_ext or self.group_node and self.group_node.use_sp_gb:
-            self.use_postproc = True
+            self.has_postproc = True
         
         o = self.assumptions
         if 'orderby' in node:
@@ -223,7 +229,7 @@ class projection(ast_node):
         
         if 'outfile' in node:
             self.outfile = outfile(self, node['outfile'], sql = self.sql)
-            if not self.use_postproc:
+            if not self.has_postproc:
                 self.sql += self.outfile.sql
         else:
             self.outfile = None
@@ -279,11 +285,12 @@ class projection(ast_node):
                     val[2].cols_mentioned.intersection(
                         self.datasource.all_cols().difference(self.group_node.refs))
                     ) and val[2].is_compound # compound val not in key
-                    # or 
+                    or 
+                    val[2].is_compound > 1
                     # (not self.group_node and val[2].is_compound)
                     ):
                     out_typenames[key] = f'ColRef<{out_typenames[key]}>'
-        
+                    self.out_table.columns[key].compound = True
         outtable_col_nameslist = ', '.join([f'"{c.name}"' for c in self.out_table.columns])
         self.outtable_col_names = 'names_' + base62uuid(4)
         self.context.emitc(f'const char* {self.outtable_col_names}[] = {{{outtable_col_nameslist}}};')
@@ -729,6 +736,17 @@ class create_table(ast_node):
     name = 'create_table'
     first_order = name
     def init(self, node):
+        node = node[self.name]
+        if 'query' in node:
+            if 'name' not in node:
+                raise ValueError("Table name not specified")
+            projection_node = node['query']
+            projection_node['into'] = node['name']
+            projection(None, projection_node, self.context)
+            self.produce = lambda *_: None
+            self.spawn = lambda *_: None
+            self.consume = lambda *_: None
+            return
         if self.parent is None:
             self.context.sql_begin()
         self.sql = 'CREATE TABLE '
@@ -851,7 +869,7 @@ class outfile(ast_node):
         
     def init(self, _):
         assert(isinstance(self.parent, projection))
-        if not self.parent.use_postproc:
+        if not self.parent.has_postproc:
             if self.context.dialect == 'MonetDB':
                 self.produce = self.produce_monetdb
             else:
diff --git a/reconstruct/expr.py b/reconstruct/expr.py
index 504ab8e..e5980d4 100644
--- a/reconstruct/expr.py
+++ b/reconstruct/expr.py
@@ -80,7 +80,7 @@ class expr(ast_node):
         self.udf_map = parent.context.udf_map
         self.func_maps = {**builtin_func, **self.udf_map, **user_module_func}
         self.operators = {**builtin_operators, **self.udf_map, **user_module_func}
-        self.ext_aggfuncs = ['sum', 'avg', 'count', 'min', 'max', 'last']
+        self.ext_aggfuncs = ['sum', 'avg', 'count', 'min', 'max', 'last', 'first']
         
     def produce(self, node):
         from engine.utils import enlist
@@ -114,9 +114,9 @@ class expr(ast_node):
                         
                         str_vals = [e.sql for e in exp_vals]
                         type_vals = [e.type for e in exp_vals]
-                        is_compound = any([e.is_compound for e in exp_vals])
+                        is_compound = max([e.is_compound for e in exp_vals])
                         if key in self.ext_aggfuncs:
-                            self.is_compound = False
+                            self.is_compound = max(0, is_compound - 1)
                         else:
                             self.is_compound = is_compound
                         try:
@@ -134,7 +134,7 @@ class expr(ast_node):
                             self.sql = op(self.c_code, *str_vals)
                             
                         special_func = [*self.context.udf_map.keys(), *self.context.module_map.keys(), 
-                                        "maxs", "mins", "avgs", "sums", "deltas", "last"]
+                                        "maxs", "mins", "avgs", "sums", "deltas", "last", "first", "ratios"]
                         if self.context.special_gb:
                             special_func = [*special_func, *self.ext_aggfuncs]
                             
@@ -259,6 +259,7 @@ class expr(ast_node):
                     self.sql = table_name + self.raw_col.name
                     self.type = self.raw_col.type
                     self.is_compound = True
+                    self.is_compound += self.raw_col.compound
                     self.opname = self.raw_col
                 else:
                     self.sql = '\'' + node + '\'' if node != '*' else '*'
diff --git a/reconstruct/new_expr.py b/reconstruct/new_expr.py
index d12ef56..b6b02cf 100644
--- a/reconstruct/new_expr.py
+++ b/reconstruct/new_expr.py
@@ -16,7 +16,7 @@ class expr_base(ast_node, metaclass = abc.ABCMeta):
         self.udf_map = self.context.udf_map
         self.func_maps = {**builtin_func, **self.udf_map, **user_module_func}
         self.operators = {**builtin_operators, **self.udf_map, **user_module_func}
-        self.narrow_funcs = ['sum', 'avg', 'count', 'min', 'max', 'last']
+        self.narrow_funcs = ['sum', 'avg', 'count', 'min', 'max', 'last', 'first']
  
     def get_variable(self):
         pass
@@ -56,7 +56,7 @@ class expr_base(ast_node, metaclass = abc.ABCMeta):
                     raise ValueError(f'Parse Error: more than 1 entry in {node}.')
                 key, val = next(iter(node.items()))
                 if key in self.operators:
-                    self.child_exprs = [__class__(self, v) for v in val]
+                    self.child_exprs = [self.__class__(self, v) for v in val]
                     self.process_child_nodes()
                 else:
                     self.process_non_operator(key, val)
diff --git a/sdk/aquery.h b/sdk/aquery.h
index 3ef5bb6..2fe0404 100644
--- a/sdk/aquery.h
+++ b/sdk/aquery.h
@@ -75,7 +75,12 @@ extern void register_memory(void* ptr, deallocator_t deallocator);
 __AQEXPORT__(void) init_session(Context* cxt);
 
 #define __AQ_NO_SESSION__ __AQEXPORT__(void) init_session(Context*) {}
+
+#ifdef _MSC_VER
+void* _cdecl memcpy(void*, void*, size_t);
+#else 
 void* memcpy(void*, const void*, unsigned long long);
+#endif
 struct ColRef_storage {
 	void* container;
 	unsigned int capacity, size;
diff --git a/server/aggregations.h b/server/aggregations.h
index 514e4a6..48a4b35 100644
--- a/server/aggregations.h
+++ b/server/aggregations.h
@@ -106,6 +106,27 @@ decayed_t<VT,T> maxw(uint32_t w, const VT<T>& arr) {
 	return ret;
 }
 
+template<class T, template<typename ...> class VT>
+decayed_t<VT, types::GetFPType<T>> ratiow(uint32_t w, const VT<T>& arr) {
+	typedef std::decay_t<types::GetFPType<T>> FPType;
+	uint32_t len = arr.size;
+	if (arr.size <= w) 
+		len = 1;
+	w = w > len ? len : w;
+	decayed_t<VT, FPType> ret(arr.size);
+	ret[0] = 0;
+	for (uint32_t i = 0; i < w; ++i) 
+		ret[i] = arr[i] / (FPType)arr[0];
+	for (uint32_t i = w; i < arr.size; ++i) 
+		ret[i] = arr[i] / (FPType) arr[i - w];
+	return ret;
+}
+
+template<class T, template<typename ...> class VT>
+decayed_t<VT, types::GetFPType<T>> ratios(const VT<T>& arr) { 
+	return ratiow(1, arr);
+}
+
 template<class T, template<typename ...> class VT>
 decayed_t<VT, types::GetLongType<T>> sums(const VT<T>& arr) {
 	const uint32_t& len = arr.size;
@@ -171,10 +192,21 @@ decayed_t<VT, T> deltas(const VT<T>& arr) {
 
 template<class T, template<typename ...> class VT>
 T last(const VT<T>& arr) {
+	if(!arr.size) return 0;
 	const uint32_t& len = arr.size;
 	return arr[arr.size - 1];
 }
 
+template<class T, template<typename ...> class VT>
+T first(const VT<T>& arr) {
+	if(!arr.size) return 0;
+	const uint32_t& len = arr.size;
+	return arr[0];
+}
+
+#define __DEFAULT_AGGREGATE_FUNCTION__(NAME, RET) \
+template <class T> constexpr inline T NAME(const T& v) { return RET; }
+
 // wrong behavior with count(0)
 template <class T> constexpr inline T count(const T& v) { return 1; }
 template <class T> constexpr inline T max(const T& v) { return v; }
@@ -185,9 +217,11 @@ template <class T> constexpr inline T maxw(uint32_t, const T& v) { return v; }
 template <class T> constexpr inline T minw(uint32_t, const T& v) { return v; }
 template <class T> constexpr inline T avgw(uint32_t, const T& v) { return v; }
 template <class T> constexpr inline T sumw(uint32_t, const T& v) { return v; }
+template <class T> constexpr inline T ratiow(uint32_t, const T& v) { return 1; }
 template <class T> constexpr inline T maxs(const T& v) { return v; }
 template <class T> constexpr inline T mins(const T& v) { return v; }
 template <class T> constexpr inline T avgs(const T& v) { return v; }
 template <class T> constexpr inline T sums(const T& v) { return v; }
 template <class T> constexpr inline T last(const T& v) { return v; }
 template <class T> constexpr inline T daltas(const T& v) { return 0; }
+template <class T> constexpr inline T ratios(const T& v) { return 1; }
diff --git a/server/table.h b/server/table.h
index 1e07968..e5502af 100644
--- a/server/table.h
+++ b/server/table.h
@@ -395,6 +395,7 @@ struct TableInfo {
 				+ num_time * types::time_t::string_length() 
 				+ num_date * types::date_t::string_length() 
 				+ num_timestamp * types::timestamp_t::string_length() 
+				+ 1 // padding for msvc not allowing empty arrays
 			];
 			setgbuf(cbuf);
 			if(view)
diff --git a/server/table_ext_monetdb.hpp b/server/table_ext_monetdb.hpp
index e74cfef..66c925a 100644
--- a/server/table_ext_monetdb.hpp
+++ b/server/table_ext_monetdb.hpp
@@ -44,8 +44,8 @@ void TableInfo<Ts ...>::monetdb_append_table(void* srv, const char* alt_name) {
 	puts("getcols done");
 	for(int i = 0; i < sizeof...(Ts); ++i)
 	{
-		printf("no:%d name: %s count:%d data: %p  \n", 
-		i, monetdbe_cols[i]->name, monetdbe_cols[i]->count, monetdbe_cols[i]->data);
+		printf("no:%d name: %s count:%d data: %p type:%d \n", 
+		i, monetdbe_cols[i]->name, monetdbe_cols[i]->count, monetdbe_cols[i]->data, monetdbe_cols[i]->type);
 	}
 	std::string create_table_str = "CREATE TABLE ";
 	create_table_str += alt_name;
diff --git a/server/types.h b/server/types.h
index d4a5656..13d1b72 100644
--- a/server/types.h
+++ b/server/types.h
@@ -29,7 +29,7 @@ namespace types {
 	static constexpr const char* printf_str[] = { "%d", "%f", "%s", "%lf", "%Lf", "%ld", "%d", "%hi", "%s", "%s", "%c",
 		"%u", "%lu", "%s", "%hu", "%hhu", "%s", "%s", "Vector<%s>", "%s", "NULL", "ERROR" };
 	static constexpr const char* SQL_Type[] = { "INT", "REAL", "TEXT", "DOUBLE", "DOUBLE", "BIGINT", "HUGEINT", "SMALLINT", "DATE", "TIME", "TINYINT",
-		"INT", "BIGINT", "HUGEINT", "SMALLINT", "TINYINT", "BIGINT", "BOOL", "BIGINT", "TIMESTAMP", "NULL", "ERROR"};
+		"INT", "BIGINT", "HUGEINT", "SMALLINT", "TINYINT", "BOOL", "BIGINT", "TIMESTAMP", "NULL", "ERROR"};
 	
 	
 	// TODO: deal with data/time <=> str/uint conversion
@@ -167,8 +167,33 @@ namespace types {
 	};
 	template<class T>
 	using GetLongType = typename GetLongTypeImpl<typename std::decay<T>::type>::type;
+
+	
+	template<class T>
+	struct GetLongerTypeImpl {
+		using type = Cond(
+
+			__U(T), Cond(__Eq(char), unsigned short,
+					Cond(__Eq(short), unsigned int, 
+					Cond(__Eq(int), unsigned long long, 
+						ULL_Type
+						))),
+
+		Cond(Fp(T), double, 
+
+					Cond(__Eq(char), short,
+					Cond(__Eq(short), int, 
+					Cond(__Eq(int), long, 
+						LL_Type	
+						))))
+
+		);
+	};
+	template<class T>
+	using GetLongerType = typename GetLongerTypeImpl<typename std::decay<T>::type>::type;
 }
 
+
 struct astring_view {
 	const unsigned char* str = 0;
 	constexpr astring_view(const char* str) :
@@ -200,7 +225,7 @@ struct astring_view {
 		return reinterpret_cast<const unsigned char*>(str);
 	}
 	operator const signed char* () const {
-		return reinterpret_cast<const signed  char*>(str);
+		return reinterpret_cast<const signed char*>(str);
 	}
 };
 
diff --git a/tests/best_profit.a b/tests/best_profit.a
index f6f3bf5..4d242ec 100644
--- a/tests/best_profit.a
+++ b/tests/best_profit.a
@@ -43,5 +43,4 @@ SELECT ID, avgs(10, ClosePrice)
 FROM   td  NATURAL JOIN
        HistoricQuotes 
               ASSUMING ASC TradeDate
-GROUP BY ID
-ORDER BY ID
\ No newline at end of file
+GROUP BY ID
\ No newline at end of file

From 3bbca0d6b081fd856f34d72aa24cefa1b11755b5 Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Fri, 23 Sep 2022 17:45:37 +0800
Subject: [PATCH 02/12] fix g++ constexpr

---
 server/types.h | 19 ++++++++++++++-----
 1 file changed, 14 insertions(+), 5 deletions(-)

diff --git a/server/types.h b/server/types.h
index 13d1b72..b41da78 100644
--- a/server/types.h
+++ b/server/types.h
@@ -196,13 +196,22 @@ namespace types {
 
 struct astring_view {
 	const unsigned char* str = 0;
-	constexpr astring_view(const char* str) :
-		str((const unsigned char*)(str)) {}
-	constexpr astring_view(const signed char* str) :
+	
+#if defined(__clang__) or !defined(__GNUC__)
+	constexpr 
+#endif
+	astring_view(const char* str) noexcept :
+		str((const unsigned char*)(str))  {}
+#if defined(__clang__) or !defined(__GNUC__)
+	constexpr
+#endif 
+	astring_view(const signed char* str) noexcept :
 		str((const unsigned char*)(str)) {}
-	constexpr astring_view(const unsigned char* str) :
+
+	constexpr
+	astring_view(const unsigned char* str) noexcept :
 		str(str) {}
-	constexpr astring_view() = default;
+	constexpr astring_view() noexcept = default;
 
 	bool operator==(const astring_view& r) const {
 		auto this_str = str;

From eac25ddbb37f18948aac773e289f593e04b82b29 Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Sat, 24 Sep 2022 22:33:59 +0800
Subject: [PATCH 03/12] Added drop table, 'if (not) exists' support. Bug fixes

---
 Makefile                     |   2 +-
 README.md                    |  77 +++++++++++++++++------------------
 aquery_config.py             |   5 ++-
 engine/types.py              |   4 +-
 reconstruct/__init__.py      |   2 +
 reconstruct/ast.py           |  43 ++++++++++++++++---
 reconstruct/storage.py       |   2 +-
 server/aggregations.h        |   3 ++
 server/io.cpp                |  26 ++++++------
 server/table.h               |   2 +-
 server/table_ext_monetdb.hpp |  23 ++++++++---
 server/types.h               |  12 ++++--
 server/vector_type.hpp       |  25 +++++++++++-
 test.aquery                  | Bin 511 -> 511 bytes
 tests/network.a              |   1 -
 15 files changed, 151 insertions(+), 76 deletions(-)

diff --git a/Makefile b/Makefile
index 4a16eb8..291a2a6 100644
--- a/Makefile
+++ b/Makefile
@@ -97,6 +97,6 @@ docker:
 	docker build -t aquery .
 
 clean:
-	rm *.shm *.o dll.so server.so server.bin libaquery.a libaquery.lib -rf 2> $(NULL_DEVICE) || true
+	rm .cached *.shm *.o dll.so server.so server.bin libaquery.a libaquery.lib -rf 2> $(NULL_DEVICE) || true
 
 
diff --git a/README.md b/README.md
index 83a072b..e171ab9 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,43 @@
 
 AQuery++ Database is a cross-platform, In-Memory Column-Store Database that incorporates compiled query execution.
 
+# Installation
+## Requirements
+1. Recent version of Linux, Windows or MacOS, with recent C++ compiler that has C++17 (1z) support. (however c++20 is recommended if available for heterogeneous lookup on unordered containers)
+     - GCC: 9.0 or above (g++ 7.x, 8.x fail to handle fold-expressions due to a compiler bug)
+     - Clang: 5.0 or above (Recommended)
+     - MSVC: 2017 or later (2022 or above is recommended)
+
+2. Monetdb for Hybrid Engine
+   - On windows, the required libraries and headers are already included in the repo.
+   - On Linux, see [Monetdb Easy Setup](https://www.monetdb.org/easy-setup/) for instructions.
+   - On MacOS, Monetdb can be easily installed in homebrew `brew install monetdb`.
+
+3. Python 3.6 or above and install required packages in requirements.txt by `python3 -m pip install -r requirements.txt` 
+## Usage
+`python3 prompt.py` will launch the interactive command prompt. The server binary will be autometically rebuilt and started.
+#### Commands:
+- `<sql statement>`: parse AQuery statement
+- `f <filename>`: parse all AQuery statements in file
+- `dbg` start debugging session 
+- `print`: printout parsed AQuery statements
+
+- `xexec`: execute last parsed statement(s) with Hybrid Execution Engine. Hybrid Execution Engine decouples the query into two parts. The standard SQL (MonetDB dialect) part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.
+- `save <OPTIONAL: filename>`: save current code snippet. will use random filename if not specified.
+- `exit`: quit the prompt
+- `exec`: execute last parsed statement(s) with AQuery Execution Engine (Old). AQuery Execution Engine executes query by compiling it to C++ code and then executing it.
+- `r`: run the last generated code snippet
+### Example:
+   `f moving_avg.a` <br>
+   `xexec`
+
+See ./tests/ for more examples. 
+
+## Notes for arm64 macOS users
+- In theory, AQuery++ could work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred. 
+- However, they can't be mixed up, i.e. make sure every component, `python` binary, `C++ compiler`, `monetdb` library and system commandline utilities such as `uname` should have the same architecture. 
+- Because I can't get access to an arm-based mac to fully test this setup, there might still be issues. Please open an issue if you encounter any problems.
+
 ## Architecture 
 ![Architecture](./docs/arch-hybrid.svg)
 
@@ -40,53 +77,15 @@ AQuery++ Database is a cross-platform, In-Memory Column-Store Database that inco
 
 ## Known Issues:
 
-- [x] User Module test
 - [ ] Interval based triggers
-- [x] Hot reloading server binary
+- [ ] Hot reloading server binary
 - [x] Bug fixes: type deduction misaligned in Hybrid Engine
 - [ ] Investigation: Using postproc only for q1 in Hybrid Engine (make is_special always on)
 - [x] Limitation: putting ColRefs back to monetdb. (Comparison)
 - [ ] C++ Meta-Programming: Eliminate template recursions as much as possible.
-- [x] Limitation: Date and Time, String operations, Funcs in groupby agg.
 - [ ] Functionality: Basic helper functions in aquery 
 - [ ] Improvement: More DDLs, e.g. drop table, update table, etc.
 - [ ] Bug: Join-Aware Column management
 - [ ] Bug: Order By after Group By
 
 
-# Installation
-## Requirements
-1. Recent version of Linux, Windows or MacOS, with recent C++ compiler that has C++17 (1z) support. (however c++20 is recommended if available for heterogeneous lookup on unordered containers)
-     - GCC: 9.0 or above (g++ 7.x, 8.x fail to handle fold-expressions due to a compiler bug)
-     - Clang: 5.0 or above (Recommended)
-     - MSVC: 2017 or later (2022 or above is recommended)
-
-2. Monetdb for Hybrid Engine
-   - On windows, the required libraries and headers are already included in the repo.
-   - On Linux, see [Monetdb Easy Setup](https://www.monetdb.org/easy-setup/) for instructions.
-   - On MacOS, Monetdb can be easily installed in homebrew `brew install monetdb`.
-
-3. Python 3.6 or above and install required packages in requirements.txt by `python3 -m pip install -r requirements.txt` 
-## Usage
-`python3 prompt.py` will launch the interactive command prompt. The server binary will be autometically rebuilt and started.
-#### Commands:
-- `<sql statement>`: parse AQuery statement
-- `f <filename>`: parse all AQuery statements in file
-- `dbg` start debugging session 
-- `print`: printout parsed AQuery statements
-
-- `xexec`: execute last parsed statement(s) with Hybrid Execution Engine. Hybrid Execution Engine decouples the query into two parts. The standard SQL (MonetDB dialect) part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.
-- `save <OPTIONAL: filename>`: save current code snippet. will use random filename if not specified.
-- `exit`: quit the prompt
-- `exec`: execute last parsed statement(s) with AQuery Execution Engine (Old). AQuery Execution Engine executes query by compiling it to C++ code and then executing it.
-- `r`: run the last generated code snippet
-### Example:
-   `f moving_avg.a` <br>
-   `xexec`
-
-See ./tests/ for more examples. 
-
-## Notes for arm64 macOS users
-- In theory, AQuery++ could work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred. 
-- However, they can't be mixed up, i.e. make sure every component, `python` binary, `C++ compiler`, `monetdb` library and system commandline utilities such as `uname` should have the same architecture. 
-- Because I can't get access to an arm-based mac to fully test this setup, there might still be issues. Please open an issue if you encounter any problems.
\ No newline at end of file
diff --git a/aquery_config.py b/aquery_config.py
index 3330b6e..616cb2a 100644
--- a/aquery_config.py
+++ b/aquery_config.py
@@ -2,7 +2,7 @@
 
 ## GLOBAL CONFIGURATION FLAGS
 
-version_string = '0.4.5a'
+version_string = '0.4.6a'
 add_path_to_ldpath = True
 rebuild_backend = False
 run_backend = True
@@ -13,7 +13,7 @@ os_platform = 'unknown'
 build_driver = 'Makefile'
 
 def init_config():
-    global __config_initialized__, os_platform, msbuildroot
+    global __config_initialized__, os_platform, msbuildroot, build_driver
 ## SETUP ENVIRONMENT VARIABLES
     # __config_initialized__ = False
     #os_platform = 'unkown'
@@ -48,6 +48,7 @@ def init_config():
             vsloc = vswhere.find(prerelease = True, latest = True, prop = 'installationPath')
             if vsloc:
                 msbuildroot = vsloc[0] + '/MSBuild/Current/Bin/MSBuild.exe'
+                build_driver = 'MSBuild'
             else:
                 print('Warning: No Visual Studio installation found.')
             # print("adding path")
diff --git a/engine/types.py b/engine/types.py
index 6e49eea..74541c6 100644
--- a/engine/types.py
+++ b/engine/types.py
@@ -112,7 +112,7 @@ VarcharT = Types(200, name = 'varchar', cname = 'const char*', sqlname='VARCHAR'
 VoidT = Types(200, name = 'void', cname = 'void', sqlname='Null', ctype_name = 'types::None')
 
 class VectorT(Types):
-    def __init__(self, inner_type : Types, vector_type:str = 'ColRef'):
+    def __init__(self, inner_type : Types, vector_type:str = 'vector_type'):
         self.inner_type = inner_type
         self.vector_type = vector_type
         
@@ -121,7 +121,7 @@ class VectorT(Types):
         return f'{self.vector_type}<{self.inner_type.name}>'
     @property
     def sqlname(self) -> str:
-        return 'BINARY'
+        return 'BIGINT'
     @property
     def cname(self) -> str:
         return self.name
diff --git a/reconstruct/__init__.py b/reconstruct/__init__.py
index c27a9da..fd02f61 100644
--- a/reconstruct/__init__.py
+++ b/reconstruct/__init__.py
@@ -18,6 +18,8 @@ def generate(ast, cxt):
             ast_node.types[k](None, ast, cxt)
 
 def exec(stmts, cxt = None, keep = False):
+    if 'stmts' not in stmts:
+        return
     cxt = initialize(cxt, keep)
     stmts_stmts = stmts['stmts']
     if type(stmts_stmts) is list:
diff --git a/reconstruct/ast.py b/reconstruct/ast.py
index 6ed4e63..52dc8ef 100644
--- a/reconstruct/ast.py
+++ b/reconstruct/ast.py
@@ -2,6 +2,7 @@ from copy import deepcopy
 from dataclasses import dataclass
 from enum import Enum, auto
 from typing import Set, Tuple, Dict, Union, List, Optional
+
 from engine.types import *
 from engine.utils import enlist, base62uuid, base62alp, get_legal_name
 from reconstruct.storage import Context, TableInfo, ColRef
@@ -151,7 +152,8 @@ class projection(ast_node):
                         name = enlist(sql_expr.eval(False, y, count=count))
                         this_type = enlist(this_type)
                         proj_expr = enlist(proj_expr)
-                    for t, n, pexpr in zip(this_type, name, proj_expr):
+                    for t, n, pexpr, cp in zip(this_type, name, proj_expr, compound):
+                        t = VectorT(t) if cp else t
                         offset = len(col_exprs)
                         if n not in self.var_table:
                             self.var_table[n] = offset
@@ -285,11 +287,11 @@ class projection(ast_node):
                     val[2].cols_mentioned.intersection(
                         self.datasource.all_cols().difference(self.group_node.refs))
                     ) and val[2].is_compound # compound val not in key
-                    or 
-                    val[2].is_compound > 1
+                    # or 
+                    # val[2].is_compound > 1
                     # (not self.group_node and val[2].is_compound)
                     ):
-                    out_typenames[key] = f'ColRef<{out_typenames[key]}>'
+                    out_typenames[key] = f'vector_type<{out_typenames[key]}>'
                     self.out_table.columns[key].compound = True
         outtable_col_nameslist = ', '.join([f'"{c.name}"' for c in self.out_table.columns])
         self.outtable_col_names = 'names_' + base62uuid(4)
@@ -530,7 +532,7 @@ class groupby_c(ast_node):
                     materialize_builtin['_builtin_len'] = len_var
                 if '_builtin_ret' in ex.udf_called.builtin_used:
                     define_len_var()
-                    gscanner.add(f'{ce[0]}.emplace_back({{{len_var}}});\n')
+                    gscanner.add(f'{ce[0]}.emplace_back({len_var});\n')
                     materialize_builtin['_builtin_ret'] = f'{ce[0]}.back()'
                     gscanner.add(f'{ex.eval(c_code = True, y=get_var_names, materialize_builtin = materialize_builtin)};\n')
                     continue
@@ -763,16 +765,45 @@ class create_table(ast_node):
         if self.context.use_columnstore:
             self.sql += ' engine=ColumnStore'
                     
+class drop(ast_node):
+    name = 'drop'
+    first_order = name
+    def produce(self, node):
+        node = node['drop']
+        tbl_name = node['table']
+        if tbl_name in self.context.tables_byname:
+            tbl_obj = self.context.tables_byname[tbl_name]
+            # TODO: delete in postproc engine
+            self.context.tables_byname.pop(tbl_name)
+            self.context.tables.remove(tbl_obj)
+            self.sql += 'TABLE IF EXISTS ' + tbl_name
+            return
+        elif 'if_exists' not in node or not node['if_exists']:
+            print(f'Error: table {tbl_name} not found.')
+        self.sql = ''
+        
 class insert(ast_node):
     name = 'insert'
     first_order = name
-    
+    def init(self, node):
+        values = node['query']
+        complex_query_kw = ['from', 'where', 'groupby', 'having', 'orderby', 'limit']
+        if any([kw in values for kw in complex_query_kw]):
+            values['into'] = node['insert']
+            projection(None, values, self.context)
+            self.produce = lambda*_:None
+            self.spawn = lambda*_:None
+            self.consume = lambda*_:None
+        else:
+            super().init(node)
+            
     def produce(self, node):
         values = node['query']['select']
         tbl = node['insert']
         self.sql = f'INSERT INTO {tbl} VALUES('
         # if len(values) != table.n_cols:
         #     raise ValueError("Column Mismatch")
+
         list_values = []
         for i, s in enumerate(values):
             if 'value' in s:
diff --git a/reconstruct/storage.py b/reconstruct/storage.py
index c43131c..790f073 100644
--- a/reconstruct/storage.py
+++ b/reconstruct/storage.py
@@ -59,7 +59,7 @@ class TableInfo:
         cxt.tables_byname[self.table_name] = self # construct reverse map
 
     def add_cols(self, cols, new = True):
-        for c in cols:
+        for c in enlist(cols):
             self.add_col(c, new)
             
     def add_col(self, c, new = True):
diff --git a/server/aggregations.h b/server/aggregations.h
index 48a4b35..05ffb56 100644
--- a/server/aggregations.h
+++ b/server/aggregations.h
@@ -137,6 +137,7 @@ decayed_t<VT, types::GetLongType<T>> sums(const VT<T>& arr) {
 		ret[i] = ret[i-1] + arr[i];
 	return ret;
 }
+
 template<class T, template<typename ...> class VT>
 decayed_t<VT, types::GetFPType<types::GetLongType<T>>> avgs(const VT<T>& arr) {
 	const uint32_t& len = arr.size;
@@ -149,6 +150,7 @@ decayed_t<VT, types::GetFPType<types::GetLongType<T>>> avgs(const VT<T>& arr) {
 		ret[i] = (s+=arr[i])/(FPType)(i+1);
 	return ret;
 }
+
 template<class T, template<typename ...> class VT>
 decayed_t<VT, types::GetLongType<T>> sumw(uint32_t w, const VT<T>& arr) {
 	const uint32_t& len = arr.size;
@@ -162,6 +164,7 @@ decayed_t<VT, types::GetLongType<T>> sumw(uint32_t w, const VT<T>& arr) {
 		ret[i] = ret[i-1] + arr[i] - arr[i-w];
 	return ret;
 }
+
 template<class T, template<typename ...> class VT>
 decayed_t<VT, types::GetFPType<types::GetLongType<T>>> avgw(uint32_t w, const VT<T>& arr) {
 	typedef types::GetFPType<types::GetLongType<T>> FPType;
diff --git a/server/io.cpp b/server/io.cpp
index 107829b..a47b3b3 100644
--- a/server/io.cpp
+++ b/server/io.cpp
@@ -265,16 +265,16 @@ string base62uuid(int l) {
 }
 
 
-template<typename _Ty>
-inline void vector_type<_Ty>::out(uint32_t n, const char* sep) const
-{
-	n = n > size ? size : n;
-	std::cout << '(';
-	{	
-		uint32_t i = 0;
-		for (; i < n - 1; ++i)
-			std::cout << this->operator[](i) << sep;
-		std::cout << this->operator[](i);
-	}
-	std::cout << ')';
-}
+// template<typename _Ty>
+// inline void vector_type<_Ty>::out(uint32_t n, const char* sep) const
+// {
+// 	n = n > size ? size : n;
+// 	std::cout << '(';
+// 	{	
+// 		uint32_t i = 0;
+// 		for (; i < n - 1; ++i)
+// 			std::cout << this->operator[](i) << sep;
+// 		std::cout << this->operator[](i);
+// 	}
+// 	std::cout << ')';
+// }
diff --git a/server/table.h b/server/table.h
index e5502af..8c0e177 100644
--- a/server/table.h
+++ b/server/table.h
@@ -129,7 +129,7 @@ public:
 	}
 
 	// defined in table_ext_monetdb.hpp
-	void* monetdb_get_col();
+	void* monetdb_get_col(void** gc_vecs, uint32_t& cnt);
 	
 };
 template<>
diff --git a/server/table_ext_monetdb.hpp b/server/table_ext_monetdb.hpp
index 66c925a..32c27f9 100644
--- a/server/table_ext_monetdb.hpp
+++ b/server/table_ext_monetdb.hpp
@@ -22,7 +22,7 @@ inline constexpr monetdbe_types AQType_2_monetdbe[] = {
 #else 
 		monetdbe_int64_t,
 #endif
-		monetdbe_int16_t, monetdbe_int8_t, monetdbe_bool, monetdbe_int64_t,
+		monetdbe_int16_t, monetdbe_int8_t, monetdbe_bool, monetdbe_int128_t,
 		monetdbe_timestamp, monetdbe_int64_t, monetdbe_int64_t
 };
 
@@ -35,10 +35,13 @@ void TableInfo<Ts ...>::monetdb_append_table(void* srv, const char* alt_name) {
 	monetdbe_column** monetdbe_cols = new monetdbe_column * [sizeof...(Ts)];
 	
 	uint32_t i = 0;
+	constexpr auto n_vecs = count_vector_type((tuple_type*)(0));
+	void* gc_vecs[1 + n_vecs];
 	puts("getcols...");
-	const auto get_col = [&monetdbe_cols, &i, *this](auto v) {
+	uint32_t cnt = 0;
+	const auto get_col = [&monetdbe_cols, &i, *this, &gc_vecs, &cnt](auto v) {
 		printf("%d %d\n", i, (ColRef<void>*)v - colrefs);
-		monetdbe_cols[i++] = (monetdbe_column*)v->monetdb_get_col();
+		monetdbe_cols[i++] = (monetdbe_column*)v->monetdb_get_col(gc_vecs, cnt);
 	};
 	(get_col((ColRef<Ts>*)(colrefs + i)), ...);
 	puts("getcols done");
@@ -47,7 +50,7 @@ void TableInfo<Ts ...>::monetdb_append_table(void* srv, const char* alt_name) {
 		printf("no:%d name: %s count:%d data: %p type:%d \n", 
 		i, monetdbe_cols[i]->name, monetdbe_cols[i]->count, monetdbe_cols[i]->data, monetdbe_cols[i]->type);
 	}
-	std::string create_table_str = "CREATE TABLE ";
+	std::string create_table_str = "CREATE TABLE IF NOT EXISTS ";
 	create_table_str += alt_name;
 	create_table_str += " (";
 	i = 0;
@@ -70,12 +73,14 @@ void TableInfo<Ts ...>::monetdb_append_table(void* srv, const char* alt_name) {
 			return;
 		}
 	}
+	// for(uint32_t i = 0; i < n_vecs; ++i) 
+	// 		free(gc_vecs[i]);
 	puts("Error! Empty table.");
 }
 
 
 template<class Type>
-void* ColRef<Type>::monetdb_get_col() {
+void* ColRef<Type>::monetdb_get_col(void** gc_vecs, uint32_t& cnt) {
 	auto aq_type = AQType_2_monetdbe[types::Types<Type>::getType()];
 	monetdbe_column* col = (monetdbe_column*)malloc(sizeof(monetdbe_column));
 
@@ -83,7 +88,13 @@ void* ColRef<Type>::monetdb_get_col() {
 	col->count = this->size;
 	col->data = this->container;
 	col->name = const_cast<char*>(this->name);
-
+	// auto arr = (types::timestamp_t*) malloc (sizeof(types::timestamp_t)* this->size);
+	// if constexpr (is_vector_type<Type>){
+	// 	for(uint32_t i = 0; i < this->size; ++i){
+	// 		memcpy(arr + i, this->container + i, sizeof(types::timestamp_t));
+	// 	}
+	// 	gc_vecs[cnt++] = arr;
+	// }
 	return col;
 }
 
diff --git a/server/types.h b/server/types.h
index b41da78..f988d4d 100644
--- a/server/types.h
+++ b/server/types.h
@@ -29,7 +29,7 @@ namespace types {
 	static constexpr const char* printf_str[] = { "%d", "%f", "%s", "%lf", "%Lf", "%ld", "%d", "%hi", "%s", "%s", "%c",
 		"%u", "%lu", "%s", "%hu", "%hhu", "%s", "%s", "Vector<%s>", "%s", "NULL", "ERROR" };
 	static constexpr const char* SQL_Type[] = { "INT", "REAL", "TEXT", "DOUBLE", "DOUBLE", "BIGINT", "HUGEINT", "SMALLINT", "DATE", "TIME", "TINYINT",
-		"INT", "BIGINT", "HUGEINT", "SMALLINT", "TINYINT", "BOOL", "BIGINT", "TIMESTAMP", "NULL", "ERROR"};
+		"INT", "BIGINT", "HUGEINT", "SMALLINT", "TINYINT", "BOOL", "HUGEINT", "TIMESTAMP", "NULL", "ERROR"};
 	
 	
 	// TODO: deal with data/time <=> str/uint conversion
@@ -197,12 +197,12 @@ namespace types {
 struct astring_view {
 	const unsigned char* str = 0;
 	
-#if defined(__clang__) or !defined(__GNUC__)
+#if defined(__clang__) || !defined(__GNUC__)
 	constexpr 
 #endif
 	astring_view(const char* str) noexcept :
 		str((const unsigned char*)(str))  {}
-#if defined(__clang__) or !defined(__GNUC__)
+#if defined(__clang__) || !defined(__GNUC__)
 	constexpr
 #endif 
 	astring_view(const signed char* str) noexcept :
@@ -373,4 +373,10 @@ constexpr size_t count_type(std::tuple<Types...>* ts) {
     size_t t[] = {sum_type<Types, T1...>() ...};
     return sum_type(t, sizeof...(Types));
 }
+template<class ...Types> 
+constexpr size_t count_vector_type(std::tuple<Types...>* ts) {
+    size_t t[] = {is_vector_type<Types> ...};
+    return sum_type(t, sizeof...(Types));
+}
+
 #endif // !_TYPES_H
diff --git a/server/vector_type.hpp b/server/vector_type.hpp
index 720db75..a73570d 100644
--- a/server/vector_type.hpp
+++ b/server/vector_type.hpp
@@ -12,11 +12,16 @@
 #include <iterator>
 #include <initializer_list>
 #include <unordered_set>
+#include <iostream>
 #include "hasher.h"
 #include "types.h"
 
 #pragma pack(push, 1)
 template <typename _Ty>
+class slim_vector {
+
+};
+template <typename _Ty>
 class vector_type {
 public:
 	typedef vector_type<_Ty> Decayed_t;
@@ -249,7 +254,25 @@ public:
 		}
 		size = this->size + dist;
 	}
-	void out(uint32_t n = 4, const char* sep = " ") const;
+	inline void out(uint32_t n = 4, const char* sep = " ") const
+	{
+		const char* more = "";
+		if (n < this->size)
+			more = " ... ";
+		else
+			n = this->size;
+
+		std::cout << '(';
+		if (n > 0)
+		{
+			uint32_t i = 0;
+			for (; i < n - 1; ++i)
+				std::cout << this->operator[](i) << sep;
+			std::cout << this->operator[](i);
+		}
+		std::cout<< more;
+		std::cout << ')';
+	}
 	vector_type<_Ty> subvec_memcpy(uint32_t start, uint32_t end) const {
 		vector_type<_Ty> subvec(end - start);
 		memcpy(subvec.container, container + start, sizeof(_Ty) * (end - start));
diff --git a/test.aquery b/test.aquery
index f9cd33c47647f494ffedf5a6104d1185297de7df..624e03b3adbb19f3c0e1019406be8145a1d2d392 100644
GIT binary patch
delta 20
bcmey*{GXXaSuwG&G_|O5VxaIw=_iZ;P|F97

delta 20
bcmey*{GXXanIW;TG_|O5VxaIw=_iZ;PW=aM

diff --git a/tests/network.a b/tests/network.a
index 922fec4..169a8b6 100644
--- a/tests/network.a
+++ b/tests/network.a
@@ -10,4 +10,3 @@ FROM	 network
 	     ASSUMING ASC src, ASC dst, ASC _time 
 GROUP BY src, dst, sums (deltas(_time) > 120)
 
-

From 668d19338a364e3d4f7f83471ea70205aaedc85c Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Sat, 24 Sep 2022 22:51:49 +0800
Subject: [PATCH 04/12] update instructions for docker

---
 README.md | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/README.md b/README.md
index e171ab9..4889320 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ AQuery++ Database is a cross-platform, In-Memory Column-Store Database that inco
 1. Recent version of Linux, Windows or MacOS, with recent C++ compiler that has C++17 (1z) support. (however c++20 is recommended if available for heterogeneous lookup on unordered containers)
      - GCC: 9.0 or above (g++ 7.x, 8.x fail to handle fold-expressions due to a compiler bug)
      - Clang: 5.0 or above (Recommended)
-     - MSVC: 2017 or later (2022 or above is recommended)
+     - MSVC: 2019 or later (2022 or above is recommended)
 
 2. Monetdb for Hybrid Engine
    - On windows, the required libraries and headers are already included in the repo.
@@ -17,8 +17,13 @@ AQuery++ Database is a cross-platform, In-Memory Column-Store Database that inco
    - On MacOS, Monetdb can be easily installed in homebrew `brew install monetdb`.
 
 3. Python 3.6 or above and install required packages in requirements.txt by `python3 -m pip install -r requirements.txt` 
+
+## DOCKER: 
+   - Alternatively, you can also use docker to run AQuery.
+   - Type `make docker` to build the docker image from scratch. 
+   - For Arm-based Mac users, you would need to build and run the x86_64 docker image because MonetDB doesn't offer official binaries for arm64 Linux. 
 ## Usage
-`python3 prompt.py` will launch the interactive command prompt. The server binary will be autometically rebuilt and started.
+`python3 prompt.py` will launch the interactive command prompt. The server binary will be automatically rebuilt and started.
 #### Commands:
 - `<sql statement>`: parse AQuery statement
 - `f <filename>`: parse all AQuery statements in file
@@ -87,5 +92,3 @@ See ./tests/ for more examples.
 - [ ] Improvement: More DDLs, e.g. drop table, update table, etc.
 - [ ] Bug: Join-Aware Column management
 - [ ] Bug: Order By after Group By
-
-

From 52b2412c01a8e7533f6e8cb130461e2c0bdce08c Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Sun, 25 Sep 2022 21:14:21 +0800
Subject: [PATCH 05/12] Updated instructions

---
 README.md | 50 +++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 41 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index 4889320..27f86b6 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,6 @@
 
 AQuery++ Database is a cross-platform, In-Memory Column-Store Database that incorporates compiled query execution.
 
-# Installation
 ## Requirements
 1. Recent version of Linux, Windows or MacOS, with recent C++ compiler that has C++17 (1z) support. (however c++20 is recommended if available for heterogeneous lookup on unordered containers)
      - GCC: 9.0 or above (g++ 7.x, 8.x fail to handle fold-expressions due to a compiler bug)
@@ -18,7 +17,46 @@ AQuery++ Database is a cross-platform, In-Memory Column-Store Database that inco
 
 3. Python 3.6 or above and install required packages in requirements.txt by `python3 -m pip install -r requirements.txt` 
 
-## DOCKER: 
+## Installation
+AQuery is tested on mainstream operating systems such as Windows, macOS and Linux
+### Windows
+There're multiple options to run AQuery on Windows. You can use the native toolchain from Microsoft Visual Studio or gcc from Cygwin/MinGW or run it under Windows Subsystem for Linux.
+
+- For WSL, Docker or linux virtual machines, see Linux, Docker sections below
+- For Visual Studio:
+  1. Install python3.6 or above from [official website](https://www.python.org/downloads/windows/) or Microsoft Store.
+  2. Install Microsoft Visual Studio 2022 or later with **Desktop development with C++** selected.
+  3. Clone AQuery repo from [Github](https://github.com/sunyinqi0508/AQuery2)
+  4. Install python requirements with pip `python3 -m pip install -r requirements.txt`
+  5. Change the build driver from aquery_config.py to "MSBuild"
+  6. The libraries and headers for Monetdb are already included in msc-plugins, however you can also choose to download them from [Monetdb Easy Setup](https://www.monetdb.org/easy-setup/) and put them in the same place.
+   
+- For MinGW:
+   1. Install gcc and python3 using the package manager. (For Msys2, `pacman -S gcc python3`)
+   2. Clone AQuery repo from Github
+   3. Install python requirements
+   4. The prebuilt binaries are included in ./lib directory. However, you could also rebuild them from [source](https://github.com/MonetDB/MonetDB).
+
+- Note that it might be possible to use python from python.org or Microsoft store with gcc from MinGW. However, it might not work because of ABI breakage. So the better way is to use gcc with MinGW python from pacman or use clang/MSVC instead.
+
+### macOS
+- Install a package manager such as [homebrew](https://brew.sh) 
+- Install python3 and monetdb using homebrew `brew install python3 monetdb`
+- Install C++ compiler come with Xcode commandline tool by `xcode-select --install` or from homebrew
+- If you have multiple C++ compilers on the system. Specify C++ compiler by setting the **CXX** environment variable. e.g. `export CXX=clang`
+- Install python packages from **requirements.txt**
+  
+**for arm64 macOS users**
+- In theory, AQuery++ could work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred. 
+- However, they can't be mixed up, i.e. make sure every component, `python` binary, `C++ compiler`, `monetdb` library and system commandline utilities such as `uname` should have the same architecture. 
+- Because I can't get access to an arm-based mac to fully test this setup, there might still be issues. Please open an issue if you encounter any problems.
+  
+### Linux
+- Install monetdb, see [Monetdb Easy Setup](https://www.monetdb.org/easy-setup/) for instructions.
+- Install python3, C++ compiler and git. (For Ubuntu, run `apt update && apt install -y python3 python3-pip clang-14 libmonetdbe-dev git `)
+- Install required python packages by `python3 -m pip install -r requirements.txt`
+- If you have multiple C++ compilers on the system. Specify C++ compiler by setting the **CXX** environment variable. e.g. `export CXX=clang-14`
+### Docker: 
    - Alternatively, you can also use docker to run AQuery.
    - Type `make docker` to build the docker image from scratch. 
    - For Arm-based Mac users, you would need to build and run the x86_64 docker image because MonetDB doesn't offer official binaries for arm64 Linux. 
@@ -33,7 +71,6 @@ AQuery++ Database is a cross-platform, In-Memory Column-Store Database that inco
 - `xexec`: execute last parsed statement(s) with Hybrid Execution Engine. Hybrid Execution Engine decouples the query into two parts. The standard SQL (MonetDB dialect) part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.
 - `save <OPTIONAL: filename>`: save current code snippet. will use random filename if not specified.
 - `exit`: quit the prompt
-- `exec`: execute last parsed statement(s) with AQuery Execution Engine (Old). AQuery Execution Engine executes query by compiling it to C++ code and then executing it.
 - `r`: run the last generated code snippet
 ### Example:
    `f moving_avg.a` <br>
@@ -41,10 +78,6 @@ AQuery++ Database is a cross-platform, In-Memory Column-Store Database that inco
 
 See ./tests/ for more examples. 
 
-## Notes for arm64 macOS users
-- In theory, AQuery++ could work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred. 
-- However, they can't be mixed up, i.e. make sure every component, `python` binary, `C++ compiler`, `monetdb` library and system commandline utilities such as `uname` should have the same architecture. 
-- Because I can't get access to an arm-based mac to fully test this setup, there might still be issues. Please open an issue if you encounter any problems.
 
 ## Architecture 
 ![Architecture](./docs/arch-hybrid.svg)
@@ -86,9 +119,8 @@ See ./tests/ for more examples.
 - [ ] Hot reloading server binary
 - [x] Bug fixes: type deduction misaligned in Hybrid Engine
 - [ ] Investigation: Using postproc only for q1 in Hybrid Engine (make is_special always on)
-- [x] Limitation: putting ColRefs back to monetdb. (Comparison)
 - [ ] C++ Meta-Programming: Eliminate template recursions as much as possible.
 - [ ] Functionality: Basic helper functions in aquery 
-- [ ] Improvement: More DDLs, e.g. drop table, update table, etc.
+- [x] Improvement: More DDLs, e.g. drop table, update table, etc.
 - [ ] Bug: Join-Aware Column management
 - [ ] Bug: Order By after Group By

From 406593a311370b38d3839d2b8462703b2025028d Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Sun, 25 Sep 2022 23:30:36 +0800
Subject: [PATCH 06/12] Fixed g++ std::hash<__uint128_t> undefined problem

---
 Dockerfile      |  2 +-
 README.md       |  2 +-
 build.py        |  3 ++-
 server/hasher.h | 46 +++++++++++++++++++++++++++++++++++++++++++---
 server/types.h  | 32 ++++++++++++++++++++++----------
 5 files changed, 69 insertions(+), 16 deletions(-)

diff --git a/Dockerfile b/Dockerfile
index d463363..92bd75d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,7 @@ RUN git clone https://github.com/sunyinqi0508/AQuery2
 
 RUN python3 -m pip install -r AQuery2/requirements.txt
 
-ENV IS_DOCKER_IMAGE=1 CXX=clang-14
+ENV IS_DOCKER_IMAGE=1 CXX=clang++-14
 
 CMD cd AQuery2 && python3 prompt.py
 
diff --git a/README.md b/README.md
index 27f86b6..6bb0f6c 100644
--- a/README.md
+++ b/README.md
@@ -55,7 +55,7 @@ There're multiple options to run AQuery on Windows. You can use the native toolc
 - Install monetdb, see [Monetdb Easy Setup](https://www.monetdb.org/easy-setup/) for instructions.
 - Install python3, C++ compiler and git. (For Ubuntu, run `apt update && apt install -y python3 python3-pip clang-14 libmonetdbe-dev git `)
 - Install required python packages by `python3 -m pip install -r requirements.txt`
-- If you have multiple C++ compilers on the system. Specify C++ compiler by setting the **CXX** environment variable. e.g. `export CXX=clang-14`
+- If you have multiple C++ compilers on the system. Specify C++ compiler by setting the **CXX** environment variable. e.g. `export CXX=clang++-14`
 ### Docker: 
    - Alternatively, you can also use docker to run AQuery.
    - Type `make docker` to build the docker image from scratch. 
diff --git a/build.py b/build.py
index aa10a7a..f6f2561 100644
--- a/build.py
+++ b/build.py
@@ -104,7 +104,8 @@ class build_manager:
         def __init__(self, mgr : 'build_manager') -> None:
             super().__init__(mgr)
             os.environ['PCH'] = f'{mgr.PCH}'
-            os.environ['CXX'] = mgr.cxx if mgr.cxx else 'c++'
+            if 'CXX' not in os.environ:
+                os.environ['CXX'] = mgr.cxx if mgr.cxx else 'c++'
         
         def libaquery_a(self):
             self.build_cmd = [['rm', 'libaquery.a'],['make', 'libaquery.a']]
diff --git a/server/hasher.h b/server/hasher.h
index 526c168..70a97e8 100644
--- a/server/hasher.h
+++ b/server/hasher.h
@@ -2,6 +2,7 @@
 
 #include <type_traits>
 #include <tuple>
+#include <functional>
 #include "types.h"
 // only works for 64 bit systems
 constexpr size_t _FNV_offset_basis = 14695981039346656037ULL;
@@ -21,7 +22,31 @@ inline size_t append_bytes(const astring_view& view) noexcept {
 	return append_bytes(view.str);
 }
 
-
+#ifdef __SIZEOF_INT128__
+union int128_struct
+{
+	struct {
+		uint64_t low, high;
+	}__struct;
+	__int128_t value = 0;
+	__uint128_t uvalue;
+	constexpr int128_struct() : value(0) {}
+	constexpr int128_struct(const __int128_t &value) noexcept : value(value) {}
+	constexpr int128_struct(const __uint128_t &value) noexcept : uvalue(value) {}
+	operator __int128_t () const {
+		return value;
+	}
+	operator __uint128_t () const {
+		return uvalue;
+	}
+	operator __int128_t& () {
+		return value;
+	}
+	operator __uint128_t& () {
+		return uvalue;
+	}
+};
+#endif
 template <class ...Types>
 struct hasher {
 	template <size_t i = 0> typename std::enable_if< i == sizeof...(Types),
@@ -32,8 +57,15 @@ struct hasher {
 	template <size_t i = 0> typename std::enable_if < i < sizeof ...(Types),
 		size_t>::type hashi(const std::tuple<Types...>& record) const {
 		using current_type = typename std::decay<typename std::tuple_element<i, std::tuple<Types...>>::type>::type;
-
-		return std::hash<current_type>()(std::get<i>(record)) ^ hashi<i + 1>(record);
+#ifdef __SIZEOF_INT128__
+		using _current_type = typename std::conditional_t<
+			std::is_same_v<current_type, __uint128_t> || 
+			std::is_same_v<current_type, __int128_t>,
+			int128_struct, current_type>;
+#else
+		#define _current_type current_type
+#endif
+		return std::hash<_current_type>()(std::get<i>(record)) ^ hashi<i + 1>(record);
 	}
 	size_t operator()(const std::tuple<Types...>& record) const {
 		return hashi(record);
@@ -75,7 +107,15 @@ namespace std{
 				std::hash<types::time_t>()(_Keyval.time);
 		}
 	};
+#ifdef __SIZEOF_INT128__
 
+	template<>
+	struct hash<int128_struct>{
+		size_t operator() (const int128_struct& _Keyval) const noexcept {
+			return std::hash<uint64_t>()(_Keyval.__struct.low) ^ std::hash<uint64_t>()(_Keyval.__struct.high);
+		}
+	};
+#endif
 	template <class ...Types>
 	struct hash<std::tuple<Types...>> : public hasher<Types...>{ };
 
diff --git a/server/types.h b/server/types.h
index f988d4d..80f9eac 100644
--- a/server/types.h
+++ b/server/types.h
@@ -3,6 +3,7 @@
 #include <cstdint>
 #include <type_traits>
 #include <tuple>
+using std::size_t;
 
 #if  defined(__SIZEOF_INT128__) and not defined(_WIN32)
 #define __AQ__HAS__INT128__
@@ -194,19 +195,19 @@ namespace types {
 }
 
 
-struct astring_view {
+union astring_view {
 	const unsigned char* str = 0;
+	const signed char* sstr;
+	const char* rstr;
+	size_t ptr;
+	
 	
-#if defined(__clang__) || !defined(__GNUC__)
 	constexpr 
-#endif
 	astring_view(const char* str) noexcept :
-		str((const unsigned char*)(str))  {}
-#if defined(__clang__) || !defined(__GNUC__)
+		rstr(str)  {}
 	constexpr
-#endif 
 	astring_view(const signed char* str) noexcept :
-		str((const unsigned char*)(str)) {}
+		sstr(str) {}
 
 	constexpr
 	astring_view(const unsigned char* str) noexcept :
@@ -225,16 +226,27 @@ struct astring_view {
 		return !(*this_str || *other_str);
 	}
 	bool operator >(const astring_view&r) const{
+		auto this_str = str;
+		auto other_str = r.str;
+		bool ret = true;
+		while (*this_str && *other_str) {
+			if (*this_str <= *other_str)
+				ret = false;
+			this_str++;
+			other_str++;
+		}
 		
+		return (*this_str && !*other_str) || 
+			(ret && !*this_str && *other_str);
 	}
 	operator const char* () const {
-		return reinterpret_cast<const char*>(str);
+		return rstr;
 	}
 	operator const unsigned char* () const {
-		return reinterpret_cast<const unsigned char*>(str);
+		return str;
 	}
 	operator const signed char* () const {
-		return reinterpret_cast<const signed char*>(str);
+		return sstr;
 	}
 };
 

From b2f009532cd2679045a31c59eca134b2024ec83e Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Mon, 26 Sep 2022 02:01:14 +0800
Subject: [PATCH 07/12] Fixed compilation for clang on Linux

---
 README.md      |   2 +-
 server/table.h | 106 ++++++++++++++++++++++++++++++++++++++-----------
 2 files changed, 83 insertions(+), 25 deletions(-)

diff --git a/README.md b/README.md
index 6bb0f6c..98ae406 100644
--- a/README.md
+++ b/README.md
@@ -22,7 +22,7 @@ AQuery is tested on mainstream operating systems such as Windows, macOS and Linu
 ### Windows
 There're multiple options to run AQuery on Windows. You can use the native toolchain from Microsoft Visual Studio or gcc from Cygwin/MinGW or run it under Windows Subsystem for Linux.
 
-- For WSL, Docker or linux virtual machines, see Linux, Docker sections below
+- For WSL, Docker or Linux virtual machines, see Linux, Docker sections below
 - For Visual Studio:
   1. Install python3.6 or above from [official website](https://www.python.org/downloads/windows/) or Microsoft Store.
   2. Install Microsoft Visual Studio 2022 or later with **Desktop development with C++** selected.
diff --git a/server/table.h b/server/table.h
index 8c0e177..68cea77 100644
--- a/server/table.h
+++ b/server/table.h
@@ -622,86 +622,144 @@ inline void TableInfo<Types...>::print(const char* __restrict sep, const char* _
 		std::cout << end;
 	}
 }
+template <class T1,
+			template<typename ...> class VT,
+			class TRet>
+using test_vt_support = typename std::enable_if_t<std::is_same_v<VT<T1>, ColRef<T1>> || 
+				std::is_same_v<VT<T1>, ColView<T1>> || 
+				std::is_same_v<VT<T1>, vector_type<T1>>, TRet>;
+
+template <class T1, class T2,
+			template<typename ...> class VT>
+using get_autoext_type = test_vt_support<T1, VT, 
+		decayed_t<VT, typename types::Coercion<T1, T2>::type>>;
+
+template <class T1, class T2,
+			template<typename ...> class VT>
+using get_long_type = test_vt_support<T1, VT, 
+		decayed_t<VT, types::GetLongType<typename types::Coercion<T1, T2>::type>>>;
+
+template <class T1, class T2,
+			template<typename ...> class VT>
+using get_fp_type = test_vt_support<T1, VT, 
+		decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>>>;
+
+template <class T1, 
+			template<typename ...> class VT, template<typename ...> class VT2,
+			class TRet>
+using test_vt_support2 = typename std::enable_if_t<(std::is_same_v<VT<T1>, ColRef<T1>> || 
+				std::is_same_v<VT<T1>, ColView<T1>> || 
+				std::is_same_v<VT<T1>, vector_type<T1>>) &&
+				(std::is_same_v<VT2<T1>, ColRef<T1>> || 
+				std::is_same_v<VT2<T1>, ColView<T1>> || 
+				std::is_same_v<VT2<T1>, vector_type<T1>>), TRet >;
+template <class T1, class T2,
+			template<typename ...> class VT, template<typename ...> class VT2>
+using get_autoext_type2 = test_vt_support2<T1, VT, VT2,
+		decayed_t<VT, typename types::Coercion<T1, T2>::type>>;
+
+template <class T1, class T2,
+			template<typename ...> class VT, template<typename ...> class VT2>
+using get_long_type2 = test_vt_support2<T1, VT, VT2,
+		decayed_t<VT, types::GetLongType<typename types::Coercion<T1, T2>::type>>>;
+
+template <class T1, class T2,
+			template<typename ...> class VT, template<typename ...> class VT2>
+using get_fp_type2 = test_vt_support2<T1, VT, VT2,
+		decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>>>;
+
 template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator -(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size);
+get_autoext_type2<T1, T2, VT, VT2>
+operator -(const VT<T1>& lhs, const VT2<T2>& rhs) {
+	auto ret = get_autoext_type2<T1, T2, VT, VT2>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] - rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator -(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size);
+get_autoext_type<T1, T2, VT>
+operator -(const VT<T1>& lhs, const T2& rhs) {
+	auto ret = get_autoext_type<T1, T2, VT>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] - rhs;
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator -(const T2& lhs, const VT<T1>& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(rhs.size);
+get_autoext_type<T1, T2, VT>
+operator -(const T2& lhs, const VT<T1>& rhs) {
+	auto ret = get_autoext_type<T1, T2, VT>(rhs.size);
 	for (uint32_t i = 0; i < rhs.size; ++i)
 		ret[i] = lhs - rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator +(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size);
+get_autoext_type2<T1, T2, VT, VT2>
+operator +(const VT<T1>& lhs, const VT2<T2>& rhs) {
+	auto ret = get_autoext_type2<T1, T2, VT, VT2>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] + rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator +(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size);
+get_autoext_type<T1, T2, VT> 
+operator +(const VT<T1>& lhs, const T2& rhs) {
+	auto ret = get_autoext_type<T1, T2, VT>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] + rhs;
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator +(const T2& lhs, const VT<T1>& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(rhs.size);
+get_autoext_type<T1, T2, VT> 
+operator +(const T2& lhs, const VT<T1>& rhs) {
+	auto ret = get_autoext_type<T1, T2, VT> (rhs.size);
 	for (uint32_t i = 0; i < rhs.size; ++i)
 		ret[i] = lhs + rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator *(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size);
+get_long_type2<T1, T2, VT, VT2> 
+operator *(const VT<T1>& lhs, const VT2<T2>& rhs) {
+	auto ret = get_long_type2<T1, T2, VT, VT2>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] * rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator *(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size);
+get_long_type<T1, T2, VT>
+operator *(const VT<T1>& lhs, const T2& rhs) {
+	auto ret = get_long_type<T1, T2, VT>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] * rhs;
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, typename types::Coercion<T1, T2>::type> operator *(const T2& lhs, const VT<T1>& rhs) {
-	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(rhs.size);
+get_long_type<T1, T2, VT>
+operator *(const T2& lhs, const VT<T1>& rhs) {
+	auto ret = get_long_type<T1, T2, VT>(rhs.size);
 	for (uint32_t i = 0; i < rhs.size; ++i)
 		ret[i] = lhs * rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
-decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>> operator /(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>>(lhs.size);
+get_fp_type2<T1, T2, VT, VT2>
+operator /(const VT<T1>& lhs, const VT2<T2>& rhs) {
+	auto ret = get_fp_type2<T1, T2, VT, VT2>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] / rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>> operator /(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>>(lhs.size);
+get_fp_type<T1, T2, VT> 
+operator /(const VT<T1>& lhs, const T2& rhs) {
+	auto ret = get_fp_type<T1, T2, VT>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] / rhs;
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>> operator /(const T2& lhs, const VT<T1>& rhs) {
-	auto ret = decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>>(rhs.size);
+get_fp_type<T1, T2, VT> 
+operator /(const T2& lhs, const VT<T1>& rhs) {
+	auto ret = get_fp_type<T1, T2, VT>(rhs.size);
 	for (uint32_t i = 0; i < rhs.size; ++i)
 		ret[i] = lhs / rhs[i];
 	return ret;

From d494c878088e98ee217d688e1d5e5da2b4d81547 Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Mon, 26 Sep 2022 02:11:04 +0800
Subject: [PATCH 08/12] try fix Linux clang compilation

---
 server/table.h | 46 +++++++++++++++++++++++-----------------------
 1 file changed, 23 insertions(+), 23 deletions(-)

diff --git a/server/table.h b/server/table.h
index 68cea77..48a01a1 100644
--- a/server/table.h
+++ b/server/table.h
@@ -623,29 +623,29 @@ inline void TableInfo<Types...>::print(const char* __restrict sep, const char* _
 	}
 }
 template <class T1,
-			template<typename ...> class VT,
+			template<typename> class VT,
 			class TRet>
 using test_vt_support = typename std::enable_if_t<std::is_same_v<VT<T1>, ColRef<T1>> || 
 				std::is_same_v<VT<T1>, ColView<T1>> || 
 				std::is_same_v<VT<T1>, vector_type<T1>>, TRet>;
 
 template <class T1, class T2,
-			template<typename ...> class VT>
+			template<typename> class VT>
 using get_autoext_type = test_vt_support<T1, VT, 
 		decayed_t<VT, typename types::Coercion<T1, T2>::type>>;
 
 template <class T1, class T2,
-			template<typename ...> class VT>
+			template<typename> class VT>
 using get_long_type = test_vt_support<T1, VT, 
 		decayed_t<VT, types::GetLongType<typename types::Coercion<T1, T2>::type>>>;
 
 template <class T1, class T2,
-			template<typename ...> class VT>
+			template<typename> class VT>
 using get_fp_type = test_vt_support<T1, VT, 
 		decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>>>;
 
 template <class T1, 
-			template<typename ...> class VT, template<typename ...> class VT2,
+			template<typename> class VT, template<typename> class VT2,
 			class TRet>
 using test_vt_support2 = typename std::enable_if_t<(std::is_same_v<VT<T1>, ColRef<T1>> || 
 				std::is_same_v<VT<T1>, ColView<T1>> || 
@@ -654,21 +654,21 @@ using test_vt_support2 = typename std::enable_if_t<(std::is_same_v<VT<T1>, ColRe
 				std::is_same_v<VT2<T1>, ColView<T1>> || 
 				std::is_same_v<VT2<T1>, vector_type<T1>>), TRet >;
 template <class T1, class T2,
-			template<typename ...> class VT, template<typename ...> class VT2>
+			template<typename> class VT, template<typename> class VT2>
 using get_autoext_type2 = test_vt_support2<T1, VT, VT2,
 		decayed_t<VT, typename types::Coercion<T1, T2>::type>>;
 
 template <class T1, class T2,
-			template<typename ...> class VT, template<typename ...> class VT2>
+			template<typename> class VT, template<typename> class VT2>
 using get_long_type2 = test_vt_support2<T1, VT, VT2,
 		decayed_t<VT, types::GetLongType<typename types::Coercion<T1, T2>::type>>>;
 
 template <class T1, class T2,
-			template<typename ...> class VT, template<typename ...> class VT2>
+			template<typename> class VT, template<typename> class VT2>
 using get_fp_type2 = test_vt_support2<T1, VT, VT2,
 		decayed_t<VT, types::GetFPType<typename types::Coercion<T1, T2>::type>>>;
 
-template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
+template <class T1, class T2, template<typename> class VT, template<typename> class VT2>
 get_autoext_type2<T1, T2, VT, VT2>
 operator -(const VT<T1>& lhs, const VT2<T2>& rhs) {
 	auto ret = get_autoext_type2<T1, T2, VT, VT2>(lhs.size);
@@ -676,7 +676,7 @@ operator -(const VT<T1>& lhs, const VT2<T2>& rhs) {
 		ret[i] = lhs[i] - rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_autoext_type<T1, T2, VT>
 operator -(const VT<T1>& lhs, const T2& rhs) {
 	auto ret = get_autoext_type<T1, T2, VT>(lhs.size);
@@ -684,7 +684,7 @@ operator -(const VT<T1>& lhs, const T2& rhs) {
 		ret[i] = lhs[i] - rhs;
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_autoext_type<T1, T2, VT>
 operator -(const T2& lhs, const VT<T1>& rhs) {
 	auto ret = get_autoext_type<T1, T2, VT>(rhs.size);
@@ -692,7 +692,7 @@ operator -(const T2& lhs, const VT<T1>& rhs) {
 		ret[i] = lhs - rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
+template <class T1, class T2, template<typename> class VT, template<typename> class VT2>
 get_autoext_type2<T1, T2, VT, VT2>
 operator +(const VT<T1>& lhs, const VT2<T2>& rhs) {
 	auto ret = get_autoext_type2<T1, T2, VT, VT2>(lhs.size);
@@ -700,7 +700,7 @@ operator +(const VT<T1>& lhs, const VT2<T2>& rhs) {
 		ret[i] = lhs[i] + rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_autoext_type<T1, T2, VT> 
 operator +(const VT<T1>& lhs, const T2& rhs) {
 	auto ret = get_autoext_type<T1, T2, VT>(lhs.size);
@@ -708,7 +708,7 @@ operator +(const VT<T1>& lhs, const T2& rhs) {
 		ret[i] = lhs[i] + rhs;
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_autoext_type<T1, T2, VT> 
 operator +(const T2& lhs, const VT<T1>& rhs) {
 	auto ret = get_autoext_type<T1, T2, VT> (rhs.size);
@@ -716,7 +716,7 @@ operator +(const T2& lhs, const VT<T1>& rhs) {
 		ret[i] = lhs + rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
+template <class T1, class T2, template<typename> class VT, template<typename> class VT2>
 get_long_type2<T1, T2, VT, VT2> 
 operator *(const VT<T1>& lhs, const VT2<T2>& rhs) {
 	auto ret = get_long_type2<T1, T2, VT, VT2>(lhs.size);
@@ -724,7 +724,7 @@ operator *(const VT<T1>& lhs, const VT2<T2>& rhs) {
 		ret[i] = lhs[i] * rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_long_type<T1, T2, VT>
 operator *(const VT<T1>& lhs, const T2& rhs) {
 	auto ret = get_long_type<T1, T2, VT>(lhs.size);
@@ -732,7 +732,7 @@ operator *(const VT<T1>& lhs, const T2& rhs) {
 		ret[i] = lhs[i] * rhs;
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_long_type<T1, T2, VT>
 operator *(const T2& lhs, const VT<T1>& rhs) {
 	auto ret = get_long_type<T1, T2, VT>(rhs.size);
@@ -740,7 +740,7 @@ operator *(const T2& lhs, const VT<T1>& rhs) {
 		ret[i] = lhs * rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
+template <class T1, class T2, template<typename> class VT, template<typename> class VT2>
 get_fp_type2<T1, T2, VT, VT2>
 operator /(const VT<T1>& lhs, const VT2<T2>& rhs) {
 	auto ret = get_fp_type2<T1, T2, VT, VT2>(lhs.size);
@@ -748,7 +748,7 @@ operator /(const VT<T1>& lhs, const VT2<T2>& rhs) {
 		ret[i] = lhs[i] / rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_fp_type<T1, T2, VT> 
 operator /(const VT<T1>& lhs, const T2& rhs) {
 	auto ret = get_fp_type<T1, T2, VT>(lhs.size);
@@ -756,7 +756,7 @@ operator /(const VT<T1>& lhs, const T2& rhs) {
 		ret[i] = lhs[i] / rhs;
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 get_fp_type<T1, T2, VT> 
 operator /(const T2& lhs, const VT<T1>& rhs) {
 	auto ret = get_fp_type<T1, T2, VT>(rhs.size);
@@ -765,21 +765,21 @@ operator /(const T2& lhs, const VT<T1>& rhs) {
 	return ret;
 }
 
-template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
+template <class T1, class T2, template<typename> class VT, template<typename> class VT2>
 VT<bool> operator >(const VT<T1>& lhs, const VT2<T2>& rhs) {
 	auto ret = VT<bool>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] > rhs[i];
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 VT<bool> operator >(const VT<T1>& lhs, const T2& rhs) {
 	auto ret = VT<bool>(lhs.size);
 	for (uint32_t i = 0; i < lhs.size; ++i)
 		ret[i] = lhs[i] > rhs;
 	return ret;
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename> class VT>
 VT<bool> operator >(const T2& lhs, const VT<T1>& rhs) {
 	auto ret = VT<bool>(rhs.size);
 	for (uint32_t i = 0; i < rhs.size; ++i)

From 3229a54bd41e14e0e626664c6e7e9d02d32716af Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Mon, 26 Sep 2022 02:23:29 +0800
Subject: [PATCH 09/12] optimize build

---
 build.py | 22 ++++++++++++++++------
 1 file changed, 16 insertions(+), 6 deletions(-)

diff --git a/build.py b/build.py
index f6f2561..79da774 100644
--- a/build.py
+++ b/build.py
@@ -16,14 +16,15 @@ class checksums:
     server : Optional[Union[bytes, bool]] = None
     sources : Union[Dict[str, bytes], bool] = None
     env : str = ''
-    def calc(self, libaquery_a = 'libaquery.a' , 
+    def calc(self, compiler_name, libaquery_a = 'libaquery.a' , 
                 pch_hpp_gch = 'server/pch.hpp.gch', 
                 server = 'server.so'
         ):
         from platform import machine
         self.env = (aquery_config.os_platform +
                     machine() + 
-                    aquery_config.build_driver
+                    aquery_config.build_driver + 
+                    compiler_name
                 )
         for key in self.__dict__.keys():
             try:
@@ -106,6 +107,8 @@ class build_manager:
             os.environ['PCH'] = f'{mgr.PCH}'
             if 'CXX' not in os.environ:
                 os.environ['CXX'] = mgr.cxx if mgr.cxx else 'c++'
+            else:
+                mgr.cxx = os.environ['CXX']
         
         def libaquery_a(self):
             self.build_cmd = [['rm', 'libaquery.a'],['make', 'libaquery.a']]
@@ -130,6 +133,10 @@ class build_manager:
     class MSBuildDriver(DriverBase):
         platform_map = {'amd64':'x64', 'arm64':'arm64', 'x86':'win32'}
         opt_map = {'0':'Debug', '1':'RelWithDebugInfo', '2':'Release', '3':'Release', '4':'Release'}
+        def __init__(self, mgr : 'build_manager') -> None:
+            super().__init__(mgr)
+            mgr.cxx = aquery_config.msbuildroot
+            
         def get_flags(self):
             self.platform = self.platform_map[self.mgr.Platform]
             self.platform = f'/p:platform={self.platform}'
@@ -143,7 +150,7 @@ class build_manager:
             return self.build()
 
         def pch(self):
-            pass
+            return True
 
         def server(self):
             loc = os.path.abspath('./msc-plugin/server.vcxproj')
@@ -185,7 +192,7 @@ class build_manager:
         libaquery_a = 'libaquery.a' 
         if aquery_config.os_platform == 'win':
             libaquery_a = 'libaquery.lib'
-        current.calc(libaquery_a)
+        current.calc(self.cxx, libaquery_a)
         try:
             with open('.cached', 'rb') as cache_sig:
                 cached = pickle.loads(cache_sig.read())
@@ -194,7 +201,10 @@ class build_manager:
         self.cache_status = current != cached
         
         success = True
-        if  force or self.cache_status.sources:
+        if  (force or 
+             self.cache_status.sources or 
+             self.cache_status.env
+        ):
             self.driver.pch()
             self.driver.libaquery_a()
             self.driver.server()
@@ -206,7 +216,7 @@ class build_manager:
             if self.cache_status.server:
                 success = self.driver.server() and success
         if success:
-            current.calc(libaquery_a)
+            current.calc(self.cxx, libaquery_a)
             with open('.cached', 'wb') as cache_sig:
                 cache_sig.write(pickle.dumps(current))
         else:

From 2ed0fd786386b29cb116d83d837d92eadf5035c7 Mon Sep 17 00:00:00 2001
From: bill sun <sunyinqi0508@gmail.com>
Date: Mon, 26 Sep 2022 04:44:09 +0800
Subject: [PATCH 10/12] Fixed windows build

---
 README.md                     | 17 ++++++++++-------
 aquery_config.py              | 21 ++++++++++++++-------
 build.py                      |  2 +-
 monetdb/msvc/monetdb_config.h |  2 +-
 sdk/aquery.h                  |  4 ++--
 server/server.cpp             |  4 ++--
 server/table_ext_monetdb.hpp  |  7 ++++++-
 server/winhelper.cpp          |  4 ++++
 server/winhelper.h            |  2 ++
 9 files changed, 42 insertions(+), 21 deletions(-)

diff --git a/README.md b/README.md
index 98ae406..f1e0cb1 100644
--- a/README.md
+++ b/README.md
@@ -23,22 +23,25 @@ AQuery is tested on mainstream operating systems such as Windows, macOS and Linu
 There're multiple options to run AQuery on Windows. You can use the native toolchain from Microsoft Visual Studio or gcc from Cygwin/MinGW or run it under Windows Subsystem for Linux.
 
 - For WSL, Docker or Linux virtual machines, see Linux, Docker sections below
-- For Visual Studio:
+- For Visual Studio (Recommended):
   1. Install python3.6 or above from [official website](https://www.python.org/downloads/windows/) or Microsoft Store.
   2. Install Microsoft Visual Studio 2022 or later with **Desktop development with C++** selected.
   3. Clone AQuery repo from [Github](https://github.com/sunyinqi0508/AQuery2)
   4. Install python requirements with pip `python3 -m pip install -r requirements.txt`
   5. Change the build driver from aquery_config.py to "MSBuild"
   6. The libraries and headers for Monetdb are already included in msc-plugins, however you can also choose to download them from [Monetdb Easy Setup](https://www.monetdb.org/easy-setup/) and put them in the same place.
-   
-- For MinGW:
-   1. Install gcc and python3 using the package manager. (For Msys2, `pacman -S gcc python3`)
+
+- For Winlibs (Recommended):
+  - Download latest winlibs toolchain from the [official website](https://winlibs.com/)
+  - Since winlibs is linked with native windows runtime libraries (UCRT or MSVCRT), it offers better interoperatibility with other libraries built with MSVC such as python and monetdb.
+  - Other steps can be either the same as Visual Studio or Cygwin/Mingw (below) without ABI break.
+  
+- For CygWin/MinGW:
+   1. Install gcc and python3 using its **builtin package manager** instead of the one from python.org or windows store. (For Msys2, `pacman -S gcc python3`)
    2. Clone AQuery repo from Github
    3. Install python requirements
    4. The prebuilt binaries are included in ./lib directory. However, you could also rebuild them from [source](https://github.com/MonetDB/MonetDB).
-
-- Note that it might be possible to use python from python.org or Microsoft store with gcc from MinGW. However, it might not work because of ABI breakage. So the better way is to use gcc with MinGW python from pacman or use clang/MSVC instead.
-
+   
 ### macOS
 - Install a package manager such as [homebrew](https://brew.sh) 
 - Install python3 and monetdb using homebrew `brew install python3 monetdb`
diff --git a/aquery_config.py b/aquery_config.py
index 616cb2a..699ad70 100644
--- a/aquery_config.py
+++ b/aquery_config.py
@@ -44,16 +44,23 @@ def init_config():
         if os_platform == 'win':
             add_dll_dir(cygroot)  
             add_dll_dir(os.path.abspath('./msc-plugin'))
-            import vswhere
-            vsloc = vswhere.find(prerelease = True, latest = True, prop = 'installationPath')
-            if vsloc:
-                msbuildroot = vsloc[0] + '/MSBuild/Current/Bin/MSBuild.exe'
-                build_driver = 'MSBuild'
-            else:
-                print('Warning: No Visual Studio installation found.')
+            if build_driver == 'Auto':
+                try:
+                    import vswhere
+                    vsloc = vswhere.find(prerelease = True, latest = True, prop = 'installationPath')
+                    if vsloc:
+                        msbuildroot = vsloc[0] + '/MSBuild/Current/Bin/MSBuild.exe'
+                        build_driver = 'MSBuild'
+                    else:
+                        print('Warning: No Visual Studio installation found.')
+                        build_driver = 'Makefile'
+                except ModuleNotFoundError:
+                    build_driver = 'Makefile'
             # print("adding path")
         else:
             import readline
+            if build_driver == 'Auto':
+                build_driver = 'Makefile'
             if os_platform == 'cygwin':
                 add_dll_dir('./lib')
         __config_initialized__ = True
diff --git a/build.py b/build.py
index 79da774..edf09be 100644
--- a/build.py
+++ b/build.py
@@ -14,7 +14,7 @@ class checksums:
     libaquery_a : Optional[Union[bytes, bool]] = None
     pch_hpp_gch : Optional[Union[bytes, bool]] = None
     server : Optional[Union[bytes, bool]] = None
-    sources : Union[Dict[str, bytes], bool] = None
+    sources : Optional[Union[Dict[str, bytes], bool]] = None
     env : str = ''
     def calc(self, compiler_name, libaquery_a = 'libaquery.a' , 
                 pch_hpp_gch = 'server/pch.hpp.gch', 
diff --git a/monetdb/msvc/monetdb_config.h b/monetdb/msvc/monetdb_config.h
index d47fef2..730c019 100644
--- a/monetdb/msvc/monetdb_config.h
+++ b/monetdb/msvc/monetdb_config.h
@@ -435,7 +435,7 @@ gmtime_r(const time_t *__restrict__ timep, struct tm *__restrict__ result)
 
 #define HAVE_SOCKLEN_T 1
 #ifndef _MSC_VER
-#define SOCKET int
+// #define SOCKET int
 #define closesocket close
 #endif
 
diff --git a/sdk/aquery.h b/sdk/aquery.h
index 2fe0404..4c9c779 100644
--- a/sdk/aquery.h
+++ b/sdk/aquery.h
@@ -76,8 +76,8 @@ __AQEXPORT__(void) init_session(Context* cxt);
 
 #define __AQ_NO_SESSION__ __AQEXPORT__(void) init_session(Context*) {}
 
-#ifdef _MSC_VER
-void* _cdecl memcpy(void*, void*, size_t);
+#ifdef _WIN32
+#include <cstring>
 #else 
 void* memcpy(void*, const void*, unsigned long long);
 #endif
diff --git a/server/server.cpp b/server/server.cpp
index c92d25a..c7b130d 100644
--- a/server/server.cpp
+++ b/server/server.cpp
@@ -176,10 +176,10 @@ int dll_main(int argc, char** argv, Context* cxt){
                                 //getlasterror
                                 
                                 if (!user_module_handle)
-#ifndef _MSC_VER
+#ifndef _WIN32
                                     puts(dlerror());
 #else
-                                    printf("Fatal Error: Module %s failed to load with error code %d.\n", mname, GetLastError());
+                                    printf("Fatal Error: Module %s failed to load with error code %d.\n", mname, dlerror());
 #endif
                                 user_module_map[mname] = user_module_handle;
                                 initialize_module(mname, user_module_handle, cxt);
diff --git a/server/table_ext_monetdb.hpp b/server/table_ext_monetdb.hpp
index 32c27f9..c128559 100644
--- a/server/table_ext_monetdb.hpp
+++ b/server/table_ext_monetdb.hpp
@@ -22,7 +22,12 @@ inline constexpr monetdbe_types AQType_2_monetdbe[] = {
 #else 
 		monetdbe_int64_t,
 #endif
-		monetdbe_int16_t, monetdbe_int8_t, monetdbe_bool, monetdbe_int128_t,
+		monetdbe_int16_t, monetdbe_int8_t, monetdbe_bool,
+#ifdef HAVE_HGE		 
+		monetdbe_int128_t,
+#else	
+		monetdbe_int64_t,
+#endif
 		monetdbe_timestamp, monetdbe_int64_t, monetdbe_int64_t
 };
 
diff --git a/server/winhelper.cpp b/server/winhelper.cpp
index 08fd1a2..ed418af 100644
--- a/server/winhelper.cpp
+++ b/server/winhelper.cpp
@@ -20,6 +20,10 @@ int dlclose(void* handle)
 	return FreeLibrary(static_cast<HMODULE>(handle));
 }
 
+int dlerror() {
+    return GetLastError();
+}
+
 SharedMemory::SharedMemory(const char* fname)
 {
     this->hFileMap = CreateFileMappingA(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, 2, fname);
diff --git a/server/winhelper.h b/server/winhelper.h
index 5993943..df9231e 100644
--- a/server/winhelper.h
+++ b/server/winhelper.h
@@ -5,6 +5,8 @@ static constexpr int RTLD_LAZY = 1;
 void* dlopen(const char*, int);
 void* dlsym(void*, const char*);
 int dlclose(void*);
+int dlerror();
+
 struct SharedMemory
 {
     void* hFileMap;

From d10a476a34b44221623abcacaef27fab7006e145 Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Tue, 27 Sep 2022 05:08:53 +0800
Subject: [PATCH 11/12] Updated instructions, bulid drivers, bug fixes

---
 AQuery2                         | 2616 +++++++++++++++++++++++++++++++
 MonetDB-release-epel.noarch.rpm |  Bin 0 -> 6588 bytes
 README.md                       |   22 +-
 aquery_config.py                |    2 +-
 arch-check.sh                   |   21 +
 build.py                        |   18 +-
 engine/utils.py                 |    5 +-
 prompt.py                       |    6 +-
 reconstruct/ast.py              |   13 +-
 reconstruct/expr.py             |   28 +-
 test.aquery                     |    3 +
 11 files changed, 2707 insertions(+), 27 deletions(-)
 create mode 100644 AQuery2
 create mode 100644 MonetDB-release-epel.noarch.rpm
 create mode 100644 arch-check.sh

diff --git a/AQuery2 b/AQuery2
new file mode 100644
index 0000000..4478769
--- /dev/null
+++ b/AQuery2
@@ -0,0 +1,2616 @@
+
+
+
+
+
+
+
+<!DOCTYPE html>
+<html lang="en" data-color-mode="auto" data-light-theme="light" data-dark-theme="dark" data-a11y-animated-images="system">
+  <head>
+    <meta charset="utf-8">
+  <link rel="dns-prefetch" href="https://github.githubassets.com">
+  <link rel="dns-prefetch" href="https://avatars.githubusercontent.com">
+  <link rel="dns-prefetch" href="https://github-cloud.s3.amazonaws.com">
+  <link rel="dns-prefetch" href="https://user-images.githubusercontent.com/">
+  <link rel="preconnect" href="https://github.githubassets.com" crossorigin>
+  <link rel="preconnect" href="https://avatars.githubusercontent.com">
+
+
+
+  <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/light-5178aee0ee76.css" /><link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/dark-217d4f9c8e70.css" /><link data-color-theme="dark_dimmed" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_dimmed-0adfa28f0e68.css" /><link data-color-theme="dark_high_contrast" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_high_contrast-1c8575b36644.css" /><link data-color-theme="dark_colorblind" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_colorblind-5113d2be20b0.css" /><link data-color-theme="light_colorblind" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/light_colorblind-c96add742484.css" /><link data-color-theme="light_high_contrast" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/light_high_contrast-290f92f5e867.css" /><link data-color-theme="light_tritanopia" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/light_tritanopia-cdd88f146bf7.css" /><link data-color-theme="dark_tritanopia" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_tritanopia-2171ea0f078b.css" />
+  
+    <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/primer-0e158a2f5ddd.css" />
+    <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/global-bec0587a3deb.css" />
+    <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/github-fb643df33dec.css" />
+  <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/code-3d7b701fc6eb.css" />
+
+    <meta name="optimizely-datafile" content="{&quot;groups&quot;: [], &quot;environmentKey&quot;: &quot;production&quot;, &quot;rollouts&quot;: [], &quot;typedAudiences&quot;: [], &quot;projectId&quot;: &quot;16737760170&quot;, &quot;variables&quot;: [], &quot;featureFlags&quot;: [], &quot;experiments&quot;: [{&quot;status&quot;: &quot;Running&quot;, &quot;audienceIds&quot;: [], &quot;variations&quot;: [{&quot;variables&quot;: [], &quot;id&quot;: &quot;21427950901&quot;, &quot;key&quot;: &quot;control&quot;}, {&quot;variables&quot;: [], &quot;id&quot;: &quot;21429710665&quot;, &quot;key&quot;: &quot;beginner&quot;}, {&quot;variables&quot;: [], &quot;id&quot;: &quot;21437291543&quot;, &quot;key&quot;: &quot;upstart&quot;}], &quot;id&quot;: &quot;21445030708&quot;, &quot;key&quot;: &quot;_259_zero_user_dashboard&quot;, &quot;layerId&quot;: &quot;21434011841&quot;, &quot;trafficAllocation&quot;: [{&quot;entityId&quot;: &quot;21427950901&quot;, &quot;endOfRange&quot;: 3334}, {&quot;entityId&quot;: &quot;21427950901&quot;, &quot;endOfRange&quot;: 5000}, {&quot;entityId&quot;: &quot;21427950901&quot;, &quot;endOfRange&quot;: 8333}, {&quot;entityId&quot;: &quot;21427950901&quot;, &quot;endOfRange&quot;: 10000}], &quot;forcedVariations&quot;: {&quot;3c64268131793aa297119a343c19e345&quot;: &quot;beginner&quot;, &quot;95b24126db31ea8693c0fe5ea9f53b65&quot;: &quot;beginner&quot;, &quot;086e2abe64e9101112af53b95d2d90b9&quot;: &quot;upstart&quot;, &quot;bae688df9d297afac98e2d254e912ada&quot;: &quot;control&quot;, &quot;6c2cfda7c41396fcc31a4db759a42b94&quot;: &quot;beginner&quot;, &quot;16ed2b4ff7de02663b7c606309695916&quot;: &quot;control&quot;, &quot;1971768911.1635962195&quot;: &quot;beginner&quot;, &quot;830bf802470ec6c9c5800c99d8e57445&quot;: &quot;beginner&quot;}}, {&quot;status&quot;: &quot;Running&quot;, &quot;audienceIds&quot;: [], &quot;variations&quot;: [{&quot;variables&quot;: [], &quot;id&quot;: &quot;21540260416&quot;, &quot;key&quot;: &quot;variant_fetch_upstream&quot;}, {&quot;variables&quot;: [], &quot;id&quot;: &quot;21551370594&quot;, &quot;key&quot;: &quot;variant_sync_fork&quot;}], &quot;id&quot;: &quot;21532540507&quot;, &quot;key&quot;: &quot;fork_syncing&quot;, &quot;layerId&quot;: &quot;21510660568&quot;, &quot;trafficAllocation&quot;: [{&quot;entityId&quot;: &quot;21551370594&quot;, &quot;endOfRange&quot;: 5000}, {&quot;entityId&quot;: &quot;21551370594&quot;, &quot;endOfRange&quot;: 10000}], &quot;forcedVariations&quot;: {&quot;bcceffdcc63834cc146ddb8cce0c556d&quot;: &quot;variant_sync_fork&quot;, &quot;0bd228f43ec6ac1a9eb9087f4e2471e6&quot;: &quot;variant_sync_fork&quot;, &quot;404ee4d837b290b3089170d9226758ea&quot;: &quot;variant_sync_fork&quot;}}, {&quot;status&quot;: &quot;Running&quot;, &quot;audienceIds&quot;: [], &quot;variations&quot;: [{&quot;variables&quot;: [], &quot;id&quot;: &quot;21571560628&quot;, &quot;key&quot;: &quot;control&quot;}, {&quot;variables&quot;: [], &quot;id&quot;: &quot;21560360470&quot;, &quot;key&quot;: &quot;separate&quot;}], &quot;id&quot;: &quot;21581240400&quot;, &quot;key&quot;: &quot;_272_zero_user_dashboard_separate&quot;, &quot;layerId&quot;: &quot;21533861783&quot;, &quot;trafficAllocation&quot;: [{&quot;entityId&quot;: &quot;21560360470&quot;, &quot;endOfRange&quot;: 5000}, {&quot;entityId&quot;: &quot;21571560628&quot;, &quot;endOfRange&quot;: 10000}], &quot;forcedVariations&quot;: {&quot;84527259280cd047a161abdd9cc3e28d&quot;: &quot;separate&quot;, &quot;ae666882652d9718723c13fda7007b3a&quot;: &quot;separate&quot;}}], &quot;version&quot;: &quot;4&quot;, &quot;audiences&quot;: [{&quot;conditions&quot;: &quot;[\&quot;or\&quot;, {\&quot;match\&quot;: \&quot;exact\&quot;, \&quot;name\&quot;: \&quot;$opt_dummy_attribute\&quot;, \&quot;type\&quot;: \&quot;custom_attribute\&quot;, \&quot;value\&quot;: \&quot;$opt_dummy_value\&quot;}]&quot;, &quot;id&quot;: &quot;$opt_dummy_audience&quot;, &quot;name&quot;: &quot;Optimizely-Generated Audience for Backwards Compatibility&quot;}], &quot;anonymizeIP&quot;: true, &quot;sdkKey&quot;: &quot;WTc6awnGuYDdG98CYRban&quot;, &quot;attributes&quot;: [{&quot;id&quot;: &quot;16822470375&quot;, &quot;key&quot;: &quot;user_id&quot;}, {&quot;id&quot;: &quot;17143601254&quot;, &quot;key&quot;: &quot;spammy&quot;}, {&quot;id&quot;: &quot;18175660309&quot;, &quot;key&quot;: &quot;organization_plan&quot;}, {&quot;id&quot;: &quot;18813001570&quot;, &quot;key&quot;: &quot;is_logged_in&quot;}, {&quot;id&quot;: &quot;19073851829&quot;, &quot;key&quot;: &quot;geo&quot;}, {&quot;id&quot;: &quot;20175462351&quot;, &quot;key&quot;: &quot;requestedCurrency&quot;}, {&quot;id&quot;: &quot;20785470195&quot;, &quot;key&quot;: &quot;country_code&quot;}, {&quot;id&quot;: &quot;21656311196&quot;, &quot;key&quot;: &quot;opened_downgrade_dialog&quot;}], &quot;botFiltering&quot;: false, &quot;accountId&quot;: &quot;16737760170&quot;, &quot;events&quot;: [{&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;17911811441&quot;, &quot;key&quot;: &quot;hydro_click.dashboard.teacher_toolbox_cta&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18124116703&quot;, &quot;key&quot;: &quot;submit.organizations.complete_sign_up&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18145892387&quot;, &quot;key&quot;: &quot;no_metric.tracked_outside_of_optimizely&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18178755568&quot;, &quot;key&quot;: &quot;click.org_onboarding_checklist.add_repo&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18180553241&quot;, &quot;key&quot;: &quot;submit.repository_imports.create&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18186103728&quot;, &quot;key&quot;: &quot;click.help.learn_more_about_repository_creation&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18188530140&quot;, &quot;key&quot;: &quot;test_event&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18191963644&quot;, &quot;key&quot;: &quot;click.empty_org_repo_cta.transfer_repository&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18195612788&quot;, &quot;key&quot;: &quot;click.empty_org_repo_cta.import_repository&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18210945499&quot;, &quot;key&quot;: &quot;click.org_onboarding_checklist.invite_members&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18211063248&quot;, &quot;key&quot;: &quot;click.empty_org_repo_cta.create_repository&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18215721889&quot;, &quot;key&quot;: &quot;click.org_onboarding_checklist.update_profile&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18224360785&quot;, &quot;key&quot;: &quot;click.org_onboarding_checklist.dismiss&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18234832286&quot;, &quot;key&quot;: &quot;submit.organization_activation.complete&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18252392383&quot;, &quot;key&quot;: &quot;submit.org_repository.create&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18257551537&quot;, &quot;key&quot;: &quot;submit.org_member_invitation.create&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18259522260&quot;, &quot;key&quot;: &quot;submit.organization_profile.update&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18564603625&quot;, &quot;key&quot;: &quot;view.classroom_select_organization&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18568612016&quot;, &quot;key&quot;: &quot;click.classroom_sign_in_click&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18572592540&quot;, &quot;key&quot;: &quot;view.classroom_name&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18574203855&quot;, &quot;key&quot;: &quot;click.classroom_create_organization&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18582053415&quot;, &quot;key&quot;: &quot;click.classroom_select_organization&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18589463420&quot;, &quot;key&quot;: &quot;click.classroom_create_classroom&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18591323364&quot;, &quot;key&quot;: &quot;click.classroom_create_first_classroom&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18591652321&quot;, &quot;key&quot;: &quot;click.classroom_grant_access&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18607131425&quot;, &quot;key&quot;: &quot;view.classroom_creation&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;18831680583&quot;, &quot;key&quot;: &quot;upgrade_account_plan&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19064064515&quot;, &quot;key&quot;: &quot;click.signup&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19075373687&quot;, &quot;key&quot;: &quot;click.view_account_billing_page&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19077355841&quot;, &quot;key&quot;: &quot;click.dismiss_signup_prompt&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19079713938&quot;, &quot;key&quot;: &quot;click.contact_sales&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19120963070&quot;, &quot;key&quot;: &quot;click.compare_account_plans&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19151690317&quot;, &quot;key&quot;: &quot;click.upgrade_account_cta&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19424193129&quot;, &quot;key&quot;: &quot;click.open_account_switcher&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19520330825&quot;, &quot;key&quot;: &quot;click.visit_account_profile&quot;}, {&quot;experimentIds&quot;: [], &quot;id&quot;: &quot;19540970635&quot;, &quot;key&quot;: &quot;click.switch_account_context&quot;}, {&quot;experimentIds&quot;: [], 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+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center pb-lg-3" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Product&quot;,&quot;action&quot;:&quot;click to go to Code review&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Code review;&quot;}" href="/features/code-review">
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+    <path d="M10.3 6.74a.75.75 0 01-.04 1.06l-2.908 2.7 2.908 2.7a.75.75 0 11-1.02 1.1l-3.5-3.25a.75.75 0 010-1.1l3.5-3.25a.75.75 0 011.06.04zm3.44 1.06a.75.75 0 111.02-1.1l3.5 3.25a.75.75 0 010 1.1l-3.5 3.25a.75.75 0 11-1.02-1.1l2.908-2.7-2.908-2.7z"></path><path fill-rule="evenodd" d="M1.5 4.25c0-.966.784-1.75 1.75-1.75h17.5c.966 0 1.75.784 1.75 1.75v12.5a1.75 1.75 0 01-1.75 1.75h-9.69l-3.573 3.573A1.457 1.457 0 015 21.043V18.5H3.25a1.75 1.75 0 01-1.75-1.75V4.25zM3.25 4a.25.25 0 00-.25.25v12.5c0 .138.112.25.25.25h2.5a.75.75 0 01.75.75v3.19l3.72-3.72a.75.75 0 01.53-.22h10a.25.25 0 00.25-.25V4.25a.25.25 0 00-.25-.25H3.25z"></path>
+</svg>
+      <div>
+        <div class="color-fg-default h4">Code review</div>
+        Manage code changes
+      </div>
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center pb-lg-3" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Product&quot;,&quot;action&quot;:&quot;click to go to Issues&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Issues;&quot;}" href="/features/issues">
+      <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-issue-opened color-fg-subtle mr-3">
+    <path fill-rule="evenodd" d="M2.5 12a9.5 9.5 0 1119 0 9.5 9.5 0 01-19 0zM12 1C5.925 1 1 5.925 1 12s4.925 11 11 11 11-4.925 11-11S18.075 1 12 1zm0 13a2 2 0 100-4 2 2 0 000 4z"></path>
+</svg>
+      <div>
+        <div class="color-fg-default h4">Issues</div>
+        Plan and track work
+      </div>
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Product&quot;,&quot;action&quot;:&quot;click to go to Discussions&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Discussions;&quot;}" href="/features/discussions">
+      <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-comment-discussion color-fg-subtle mr-3">
+    <path fill-rule="evenodd" d="M1.75 1A1.75 1.75 0 000 2.75v9.5C0 13.216.784 14 1.75 14H3v1.543a1.457 1.457 0 002.487 1.03L8.061 14h6.189A1.75 1.75 0 0016 12.25v-9.5A1.75 1.75 0 0014.25 1H1.75zM1.5 2.75a.25.25 0 01.25-.25h12.5a.25.25 0 01.25.25v9.5a.25.25 0 01-.25.25h-6.5a.75.75 0 00-.53.22L4.5 15.44v-2.19a.75.75 0 00-.75-.75h-2a.25.25 0 01-.25-.25v-9.5z"></path><path d="M22.5 8.75a.25.25 0 00-.25-.25h-3.5a.75.75 0 010-1.5h3.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0122.25 20H21v1.543a1.457 1.457 0 01-2.487 1.03L15.939 20H10.75A1.75 1.75 0 019 18.25v-1.465a.75.75 0 011.5 0v1.465c0 .138.112.25.25.25h5.5a.75.75 0 01.53.22l2.72 2.72v-2.19a.75.75 0 01.75-.75h2a.25.25 0 00.25-.25v-9.5z"></path>
+</svg>
+      <div>
+        <div class="color-fg-default h4">Discussions</div>
+        Collaborate outside of code
+      </div>
+
+    
+</a></li>
+
+        </ul>
+        <ul class="list-style-none f5 px-lg-4">
+            <li class="h4 color-fg-default my-1">Explore</li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Product&quot;,&quot;action&quot;:&quot;click to go to All features&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:All features;&quot;}" href="/features">
+      All features
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" target="_blank" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Product&quot;,&quot;action&quot;:&quot;click to go to Documentation&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Documentation;&quot;}" href="https://docs.github.com">
+      Documentation
+
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
+    <path fill-rule="evenodd" d="M10.604 1h4.146a.25.25 0 01.25.25v4.146a.25.25 0 01-.427.177L13.03 4.03 9.28 7.78a.75.75 0 01-1.06-1.06l3.75-3.75-1.543-1.543A.25.25 0 0110.604 1zM3.75 2A1.75 1.75 0 002 3.75v8.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 12.25v-3.5a.75.75 0 00-1.5 0v3.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-8.5a.25.25 0 01.25-.25h3.5a.75.75 0 000-1.5h-3.5z"></path>
+</svg>
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" target="_blank" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Product&quot;,&quot;action&quot;:&quot;click to go to GitHub Skills&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:GitHub Skills;&quot;}" href="https://skills.github.com/">
+      GitHub Skills
+
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
+    <path fill-rule="evenodd" d="M10.604 1h4.146a.25.25 0 01.25.25v4.146a.25.25 0 01-.427.177L13.03 4.03 9.28 7.78a.75.75 0 01-1.06-1.06l3.75-3.75-1.543-1.543A.25.25 0 0110.604 1zM3.75 2A1.75 1.75 0 002 3.75v8.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 12.25v-3.5a.75.75 0 00-1.5 0v3.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-8.5a.25.25 0 01.25-.25h3.5a.75.75 0 000-1.5h-3.5z"></path>
+</svg>
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" target="_blank" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Product&quot;,&quot;action&quot;:&quot;click to go to Changelog&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Changelog;&quot;}" href="https://github.blog/changelog">
+      Changelog
+
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
+    <path fill-rule="evenodd" d="M10.604 1h4.146a.25.25 0 01.25.25v4.146a.25.25 0 01-.427.177L13.03 4.03 9.28 7.78a.75.75 0 01-1.06-1.06l3.75-3.75-1.543-1.543A.25.25 0 0110.604 1zM3.75 2A1.75 1.75 0 002 3.75v8.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 12.25v-3.5a.75.75 0 00-1.5 0v3.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-8.5a.25.25 0 01.25-.25h3.5a.75.75 0 000-1.5h-3.5z"></path>
+</svg>
+</a></li>
+
+        </ul>
+    </div>
+</li>
+
+
+                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
+    <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-3 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false">
+      Solutions
+      <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1">
+    <path fill-rule="evenodd" d="M12.78 6.22a.75.75 0 010 1.06l-4.25 4.25a.75.75 0 01-1.06 0L3.22 7.28a.75.75 0 011.06-1.06L8 9.94l3.72-3.72a.75.75 0 011.06 0z"></path>
+</svg>
+    </button>
+    <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 py-2 py-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 px-lg-4">
+        <ul class="list-style-none f5 border-bottom pb-3 mb-3">
+            <li class="h4 color-fg-default my-1">By Plan</li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to Enterprise&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Enterprise;&quot;}" href="/enterprise">
+      Enterprise
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to Teams&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Teams;&quot;}" href="/team">
+      Teams
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to Compare all&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Compare all;&quot;}" href="/pricing#compare-features">
+      Compare all
+
+    
+</a></li>
+
+        </ul>
+        <ul class="list-style-none f5 border-bottom pb-3 mb-3">
+            <li class="h4 color-fg-default my-1">By Solution</li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" target="_blank" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to CI/CD &amp;amp; Automation&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:CI/CD &amp;amp; Automation;&quot;}" href="https://resources.github.com/ci-cd/">
+      CI/CD &amp; Automation
+
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
+    <path fill-rule="evenodd" d="M10.604 1h4.146a.25.25 0 01.25.25v4.146a.25.25 0 01-.427.177L13.03 4.03 9.28 7.78a.75.75 0 01-1.06-1.06l3.75-3.75-1.543-1.543A.25.25 0 0110.604 1zM3.75 2A1.75 1.75 0 002 3.75v8.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 12.25v-3.5a.75.75 0 00-1.5 0v3.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-8.5a.25.25 0 01.25-.25h3.5a.75.75 0 000-1.5h-3.5z"></path>
+</svg>
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" target="_blank" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to DevOps&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:DevOps;&quot;}" href="https://resources.github.com/devops/">
+      DevOps
+
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
+    <path fill-rule="evenodd" d="M10.604 1h4.146a.25.25 0 01.25.25v4.146a.25.25 0 01-.427.177L13.03 4.03 9.28 7.78a.75.75 0 01-1.06-1.06l3.75-3.75-1.543-1.543A.25.25 0 0110.604 1zM3.75 2A1.75 1.75 0 002 3.75v8.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 12.25v-3.5a.75.75 0 00-1.5 0v3.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-8.5a.25.25 0 01.25-.25h3.5a.75.75 0 000-1.5h-3.5z"></path>
+</svg>
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" target="_blank" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to DevSecOps&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:DevSecOps;&quot;}" href="https://resources.github.com/devops/fundamentals/devsecops/">
+      DevSecOps
+
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
+    <path fill-rule="evenodd" d="M10.604 1h4.146a.25.25 0 01.25.25v4.146a.25.25 0 01-.427.177L13.03 4.03 9.28 7.78a.75.75 0 01-1.06-1.06l3.75-3.75-1.543-1.543A.25.25 0 0110.604 1zM3.75 2A1.75 1.75 0 002 3.75v8.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 12.25v-3.5a.75.75 0 00-1.5 0v3.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-8.5a.25.25 0 01.25-.25h3.5a.75.75 0 000-1.5h-3.5z"></path>
+</svg>
+</a></li>
+
+        </ul>
+        <ul class="list-style-none f5 ">
+            <li class="h4 color-fg-default my-1">Case Studies</li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to Customer Stories&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Customer Stories;&quot;}" href="/customer-stories">
+      Customer Stories
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" target="_blank" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Solutions&quot;,&quot;action&quot;:&quot;click to go to Resources&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Resources;&quot;}" href="https://resources.github.com/">
+      Resources
+
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
+    <path fill-rule="evenodd" d="M10.604 1h4.146a.25.25 0 01.25.25v4.146a.25.25 0 01-.427.177L13.03 4.03 9.28 7.78a.75.75 0 01-1.06-1.06l3.75-3.75-1.543-1.543A.25.25 0 0110.604 1zM3.75 2A1.75 1.75 0 002 3.75v8.5c0 .966.784 1.75 1.75 1.75h8.5A1.75 1.75 0 0014 12.25v-3.5a.75.75 0 00-1.5 0v3.5a.25.25 0 01-.25.25h-8.5a.25.25 0 01-.25-.25v-8.5a.25.25 0 01.25-.25h3.5a.75.75 0 000-1.5h-3.5z"></path>
+</svg>
+</a></li>
+
+        </ul>
+    </div>
+</li>
+
+
+                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
+    <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-3 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false">
+      Open Source
+      <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1">
+    <path fill-rule="evenodd" d="M12.78 6.22a.75.75 0 010 1.06l-4.25 4.25a.75.75 0 01-1.06 0L3.22 7.28a.75.75 0 011.06-1.06L8 9.94l3.72-3.72a.75.75 0 011.06 0z"></path>
+</svg>
+    </button>
+    <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 py-2 py-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 px-lg-4">
+        <ul class="list-style-none f5 border-bottom pb-3 mb-3">
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Open Source&quot;,&quot;action&quot;:&quot;click to go to GitHub Sponsors&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:GitHub Sponsors;&quot;}" href="/sponsors">
+      
+      <div>
+        <div class="color-fg-default h4">GitHub Sponsors</div>
+        Fund open source developers
+      </div>
+
+    
+</a></li>
+
+        </ul>
+        <ul class="list-style-none f5 border-bottom pb-3 mb-3">
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Open Source&quot;,&quot;action&quot;:&quot;click to go to The ReadME Project&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:The ReadME Project;&quot;}" href="/readme">
+      
+      <div>
+        <div class="color-fg-default h4">The ReadME Project</div>
+        GitHub community articles
+      </div>
+
+    
+</a></li>
+
+        </ul>
+        <ul class="list-style-none f5 ">
+            <li class="h4 color-fg-default my-1">Repositories</li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Open Source&quot;,&quot;action&quot;:&quot;click to go to Topics&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Topics;&quot;}" href="/topics">
+      Topics
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Open Source&quot;,&quot;action&quot;:&quot;click to go to Trending&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Trending;&quot;}" href="/trending">
+      Trending
+
+    
+</a></li>
+
+            <li>
+  <a class="HeaderMenu-dropdown-link lh-condensed d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;category&quot;:&quot;Header dropdown (logged out), Open Source&quot;,&quot;action&quot;:&quot;click to go to Collections&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Collections;&quot;}" href="/collections">
+      Collections
+
+    
+</a></li>
+
+        </ul>
+    </div>
+</li>
+
+
+                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
+    <a class="HeaderMenu-link no-underline px-0 px-lg-2 py-3 py-lg-2 d-block d-lg-inline-block" data-analytics-event="{&quot;category&quot;:&quot;Header menu top item (logged out)&quot;,&quot;action&quot;:&quot;click to go to Pricing&quot;,&quot;label&quot;:&quot;ref_page:/sunyinqi0508/AQuery2;ref_cta:Pricing;&quot;}" href="/pricing">Pricing</a>
+</li>
+
+            </ul>
+          </nav>
+
+        <div class="d-lg-flex flex-items-center px-3 px-lg-0 mb-3 mb-lg-0 text-center text-lg-left">
+            <div class="d-lg-flex min-width-0 mb-2 mb-lg-0">
+              
+
+
+
+<div class="header-search flex-auto js-site-search position-relative flex-self-stretch flex-md-self-auto mb-3 mb-md-0 mr-0 mr-md-3 scoped-search site-scoped-search js-jump-to"
+>
+  <div class="position-relative">
+    <!-- '"` --><!-- </textarea></xmp> --></option></form><form class="js-site-search-form" role="search" aria-label="Site" data-scope-type="Repository" data-scope-id="484854813" data-scoped-search-url="/sunyinqi0508/AQuery2/search" data-owner-scoped-search-url="/users/sunyinqi0508/search" data-unscoped-search-url="/search" data-turbo="false" action="/sunyinqi0508/AQuery2/search" accept-charset="UTF-8" method="get">
+      <label class="form-control input-sm header-search-wrapper p-0 js-chromeless-input-container header-search-wrapper-jump-to position-relative d-flex flex-justify-between flex-items-center">
+        <input type="text"
+          class="form-control input-sm header-search-input jump-to-field js-jump-to-field js-site-search-focus js-site-search-field is-clearable"
+          data-hotkey=s,/
+          name="q"
+          data-test-selector="nav-search-input"
+          placeholder="Search"
+          data-unscoped-placeholder="Search GitHub"
+          data-scoped-placeholder="Search"
+          autocapitalize="off"
+          role="combobox"
+          aria-haspopup="listbox"
+          aria-expanded="false"
+          aria-autocomplete="list"
+          aria-controls="jump-to-results"
+          aria-label="Search"
+          data-jump-to-suggestions-path="/_graphql/GetSuggestedNavigationDestinations"
+          spellcheck="false"
+          autocomplete="off"
+        >
+        <input type="hidden" data-csrf="true" class="js-data-jump-to-suggestions-path-csrf" value="1vSLED8Bn+/hRfH5h/xJZ/O6PTGoFC79YJHY7xJNQCuU78fwo9Vc6WSdCuu+ofbyaen51lJu+XmXoKF7vYhzQg==" />
+        <input type="hidden" class="js-site-search-type-field" name="type" >
+            <svg xmlns="http://www.w3.org/2000/svg" width="22" height="20" aria-hidden="true" class="mr-1 header-search-key-slash"><path fill="none" stroke="#979A9C" opacity=".4" d="M3.5.5h12c1.7 0 3 1.3 3 3v13c0 1.7-1.3 3-3 3h-12c-1.7 0-3-1.3-3-3v-13c0-1.7 1.3-3 3-3z"></path><path fill="#979A9C" d="M11.8 6L8 15.1h-.9L10.8 6h1z"></path></svg>
+
+
+          <div class="Box position-absolute overflow-hidden d-none jump-to-suggestions js-jump-to-suggestions-container">
+            
+<ul class="d-none js-jump-to-suggestions-template-container">
+  
+
+<li class="d-flex flex-justify-start flex-items-center p-0 f5 navigation-item js-navigation-item js-jump-to-suggestion" role="option">
+  <a tabindex="-1" class="no-underline d-flex flex-auto flex-items-center jump-to-suggestions-path js-jump-to-suggestion-path js-navigation-open p-2" href="" data-item-type="suggestion">
+    <div class="jump-to-octicon js-jump-to-octicon flex-shrink-0 mr-2 text-center d-none">
+      <svg title="Repository" aria-label="Repository" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo js-jump-to-octicon-repo d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path>
+</svg>
+      <svg title="Project" aria-label="Project" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-project js-jump-to-octicon-project d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M1.75 0A1.75 1.75 0 000 1.75v12.5C0 15.216.784 16 1.75 16h12.5A1.75 1.75 0 0016 14.25V1.75A1.75 1.75 0 0014.25 0H1.75zM1.5 1.75a.25.25 0 01.25-.25h12.5a.25.25 0 01.25.25v12.5a.25.25 0 01-.25.25H1.75a.25.25 0 01-.25-.25V1.75zM11.75 3a.75.75 0 00-.75.75v7.5a.75.75 0 001.5 0v-7.5a.75.75 0 00-.75-.75zm-8.25.75a.75.75 0 011.5 0v5.5a.75.75 0 01-1.5 0v-5.5zM8 3a.75.75 0 00-.75.75v3.5a.75.75 0 001.5 0v-3.5A.75.75 0 008 3z"></path>
+</svg>
+      <svg title="Search" aria-label="Search" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search js-jump-to-octicon-search d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M11.5 7a4.499 4.499 0 11-8.998 0A4.499 4.499 0 0111.5 7zm-.82 4.74a6 6 0 111.06-1.06l3.04 3.04a.75.75 0 11-1.06 1.06l-3.04-3.04z"></path>
+</svg>
+    </div>
+
+    <img class="avatar mr-2 flex-shrink-0 js-jump-to-suggestion-avatar d-none" alt="" aria-label="Team" src="" width="28" height="28">
+
+    <div class="jump-to-suggestion-name js-jump-to-suggestion-name flex-auto overflow-hidden text-left no-wrap css-truncate css-truncate-target">
+    </div>
+
+    <div class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none js-jump-to-badge-search">
+      <span class="js-jump-to-badge-search-text-default d-none" aria-label="in this repository">
+        In this repository
+      </span>
+      <span class="js-jump-to-badge-search-text-global d-none" aria-label="in all of GitHub">
+        All GitHub
+      </span>
+      <span aria-hidden="true" class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+
+    <div aria-hidden="true" class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none d-on-nav-focus js-jump-to-badge-jump">
+      Jump to
+      <span class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+  </a>
+</li>
+
+</ul>
+
+<ul class="d-none js-jump-to-no-results-template-container">
+  <li class="d-flex flex-justify-center flex-items-center f5 d-none js-jump-to-suggestion p-2">
+    <span class="color-fg-muted">No suggested jump to results</span>
+  </li>
+</ul>
+
+<ul id="jump-to-results" role="listbox" class="p-0 m-0 js-navigation-container jump-to-suggestions-results-container js-jump-to-suggestions-results-container">
+  
+
+<li class="d-flex flex-justify-start flex-items-center p-0 f5 navigation-item js-navigation-item js-jump-to-scoped-search d-none" role="option">
+  <a tabindex="-1" class="no-underline d-flex flex-auto flex-items-center jump-to-suggestions-path js-jump-to-suggestion-path js-navigation-open p-2" href="" data-item-type="scoped_search">
+    <div class="jump-to-octicon js-jump-to-octicon flex-shrink-0 mr-2 text-center d-none">
+      <svg title="Repository" aria-label="Repository" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo js-jump-to-octicon-repo d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path>
+</svg>
+      <svg title="Project" aria-label="Project" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-project js-jump-to-octicon-project d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M1.75 0A1.75 1.75 0 000 1.75v12.5C0 15.216.784 16 1.75 16h12.5A1.75 1.75 0 0016 14.25V1.75A1.75 1.75 0 0014.25 0H1.75zM1.5 1.75a.25.25 0 01.25-.25h12.5a.25.25 0 01.25.25v12.5a.25.25 0 01-.25.25H1.75a.25.25 0 01-.25-.25V1.75zM11.75 3a.75.75 0 00-.75.75v7.5a.75.75 0 001.5 0v-7.5a.75.75 0 00-.75-.75zm-8.25.75a.75.75 0 011.5 0v5.5a.75.75 0 01-1.5 0v-5.5zM8 3a.75.75 0 00-.75.75v3.5a.75.75 0 001.5 0v-3.5A.75.75 0 008 3z"></path>
+</svg>
+      <svg title="Search" aria-label="Search" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search js-jump-to-octicon-search d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M11.5 7a4.499 4.499 0 11-8.998 0A4.499 4.499 0 0111.5 7zm-.82 4.74a6 6 0 111.06-1.06l3.04 3.04a.75.75 0 11-1.06 1.06l-3.04-3.04z"></path>
+</svg>
+    </div>
+
+    <img class="avatar mr-2 flex-shrink-0 js-jump-to-suggestion-avatar d-none" alt="" aria-label="Team" src="" width="28" height="28">
+
+    <div class="jump-to-suggestion-name js-jump-to-suggestion-name flex-auto overflow-hidden text-left no-wrap css-truncate css-truncate-target">
+    </div>
+
+    <div class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none js-jump-to-badge-search">
+      <span class="js-jump-to-badge-search-text-default d-none" aria-label="in this repository">
+        In this repository
+      </span>
+      <span class="js-jump-to-badge-search-text-global d-none" aria-label="in all of GitHub">
+        All GitHub
+      </span>
+      <span aria-hidden="true" class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+
+    <div aria-hidden="true" class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none d-on-nav-focus js-jump-to-badge-jump">
+      Jump to
+      <span class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+  </a>
+</li>
+
+  
+
+<li class="d-flex flex-justify-start flex-items-center p-0 f5 navigation-item js-navigation-item js-jump-to-owner-scoped-search d-none" role="option">
+  <a tabindex="-1" class="no-underline d-flex flex-auto flex-items-center jump-to-suggestions-path js-jump-to-suggestion-path js-navigation-open p-2" href="" data-item-type="owner_scoped_search">
+    <div class="jump-to-octicon js-jump-to-octicon flex-shrink-0 mr-2 text-center d-none">
+      <svg title="Repository" aria-label="Repository" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo js-jump-to-octicon-repo d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path>
+</svg>
+      <svg title="Project" aria-label="Project" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-project js-jump-to-octicon-project d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M1.75 0A1.75 1.75 0 000 1.75v12.5C0 15.216.784 16 1.75 16h12.5A1.75 1.75 0 0016 14.25V1.75A1.75 1.75 0 0014.25 0H1.75zM1.5 1.75a.25.25 0 01.25-.25h12.5a.25.25 0 01.25.25v12.5a.25.25 0 01-.25.25H1.75a.25.25 0 01-.25-.25V1.75zM11.75 3a.75.75 0 00-.75.75v7.5a.75.75 0 001.5 0v-7.5a.75.75 0 00-.75-.75zm-8.25.75a.75.75 0 011.5 0v5.5a.75.75 0 01-1.5 0v-5.5zM8 3a.75.75 0 00-.75.75v3.5a.75.75 0 001.5 0v-3.5A.75.75 0 008 3z"></path>
+</svg>
+      <svg title="Search" aria-label="Search" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search js-jump-to-octicon-search d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M11.5 7a4.499 4.499 0 11-8.998 0A4.499 4.499 0 0111.5 7zm-.82 4.74a6 6 0 111.06-1.06l3.04 3.04a.75.75 0 11-1.06 1.06l-3.04-3.04z"></path>
+</svg>
+    </div>
+
+    <img class="avatar mr-2 flex-shrink-0 js-jump-to-suggestion-avatar d-none" alt="" aria-label="Team" src="" width="28" height="28">
+
+    <div class="jump-to-suggestion-name js-jump-to-suggestion-name flex-auto overflow-hidden text-left no-wrap css-truncate css-truncate-target">
+    </div>
+
+    <div class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none js-jump-to-badge-search">
+      <span class="js-jump-to-badge-search-text-default d-none" aria-label="in this user">
+        In this user
+      </span>
+      <span class="js-jump-to-badge-search-text-global d-none" aria-label="in all of GitHub">
+        All GitHub
+      </span>
+      <span aria-hidden="true" class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+
+    <div aria-hidden="true" class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none d-on-nav-focus js-jump-to-badge-jump">
+      Jump to
+      <span class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+  </a>
+</li>
+
+  
+
+<li class="d-flex flex-justify-start flex-items-center p-0 f5 navigation-item js-navigation-item js-jump-to-global-search d-none" role="option">
+  <a tabindex="-1" class="no-underline d-flex flex-auto flex-items-center jump-to-suggestions-path js-jump-to-suggestion-path js-navigation-open p-2" href="" data-item-type="global_search">
+    <div class="jump-to-octicon js-jump-to-octicon flex-shrink-0 mr-2 text-center d-none">
+      <svg title="Repository" aria-label="Repository" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo js-jump-to-octicon-repo d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path>
+</svg>
+      <svg title="Project" aria-label="Project" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-project js-jump-to-octicon-project d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M1.75 0A1.75 1.75 0 000 1.75v12.5C0 15.216.784 16 1.75 16h12.5A1.75 1.75 0 0016 14.25V1.75A1.75 1.75 0 0014.25 0H1.75zM1.5 1.75a.25.25 0 01.25-.25h12.5a.25.25 0 01.25.25v12.5a.25.25 0 01-.25.25H1.75a.25.25 0 01-.25-.25V1.75zM11.75 3a.75.75 0 00-.75.75v7.5a.75.75 0 001.5 0v-7.5a.75.75 0 00-.75-.75zm-8.25.75a.75.75 0 011.5 0v5.5a.75.75 0 01-1.5 0v-5.5zM8 3a.75.75 0 00-.75.75v3.5a.75.75 0 001.5 0v-3.5A.75.75 0 008 3z"></path>
+</svg>
+      <svg title="Search" aria-label="Search" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search js-jump-to-octicon-search d-none flex-shrink-0">
+    <path fill-rule="evenodd" d="M11.5 7a4.499 4.499 0 11-8.998 0A4.499 4.499 0 0111.5 7zm-.82 4.74a6 6 0 111.06-1.06l3.04 3.04a.75.75 0 11-1.06 1.06l-3.04-3.04z"></path>
+</svg>
+    </div>
+
+    <img class="avatar mr-2 flex-shrink-0 js-jump-to-suggestion-avatar d-none" alt="" aria-label="Team" src="" width="28" height="28">
+
+    <div class="jump-to-suggestion-name js-jump-to-suggestion-name flex-auto overflow-hidden text-left no-wrap css-truncate css-truncate-target">
+    </div>
+
+    <div class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none js-jump-to-badge-search">
+      <span class="js-jump-to-badge-search-text-default d-none" aria-label="in this repository">
+        In this repository
+      </span>
+      <span class="js-jump-to-badge-search-text-global d-none" aria-label="in all of GitHub">
+        All GitHub
+      </span>
+      <span aria-hidden="true" class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+
+    <div aria-hidden="true" class="border rounded-2 flex-shrink-0 color-bg-subtle px-1 color-fg-muted ml-1 f6 d-none d-on-nav-focus js-jump-to-badge-jump">
+      Jump to
+      <span class="d-inline-block ml-1 v-align-middle">↵</span>
+    </div>
+  </a>
+</li>
+
+
+</ul>
+
+          </div>
+      </label>
+</form>  </div>
+</div>
+
+            </div>
+
+          <div class="position-relative mr-lg-3 d-lg-inline-block">
+            <a href="/login?return_to=https%3A%2F%2Fgithub.com%2Fsunyinqi0508%2FAQuery2"
+              class="HeaderMenu-link HeaderMenu-link--sign-in flex-shrink-0 no-underline d-block d-lg-inline-block border border-lg-0 rounded rounded-lg-0 p-2 p-lg-0"
+              data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;site header menu&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;SIGN_UP&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="e4b5fe731a6690114cd1e057638b5e0325e032e42f7ee46497d02253ca555a8f"
+              data-ga-click="(Logged out) Header, clicked Sign in, text:sign-in">
+              Sign in
+            </a>
+          </div>
+
+            <a href="/signup?ref_cta=Sign+up&amp;ref_loc=header+logged+out&amp;ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E&amp;source=header-repo&amp;source_repo=sunyinqi0508%2FAQuery2"
+              class="HeaderMenu-link HeaderMenu-link--sign-up flex-shrink-0 d-none d-lg-inline-block no-underline border color-border-default rounded px-2 py-1"
+              data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;site header menu&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;SIGN_UP&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="e4b5fe731a6690114cd1e057638b5e0325e032e42f7ee46497d02253ca555a8f"
+              data-analytics-event="{&quot;category&quot;:&quot;Sign up&quot;,&quot;action&quot;:&quot;click to sign up for account&quot;,&quot;label&quot;:&quot;ref_page:/&lt;user-name&gt;/&lt;repo-name&gt;;ref_cta:Sign up;ref_loc:header logged out&quot;}"
+            >
+              Sign up
+            </a>
+        </div>
+      </div>
+    </div>
+  </div>
+</header>
+
+    </div>
+
+  <div id="start-of-content" class="show-on-focus"></div>
+
+
+
+
+
+
+
+    <div id="js-flash-container" data-turbo-replace>
+
+
+
+
+  <template class="js-flash-template">
+    
+<div class="flash flash-full   {{ className }}">
+  <div class="px-2" >
+    <button class="flash-close js-flash-close" type="button" aria-label="Dismiss this message">
+      <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x">
+    <path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path>
+</svg>
+    </button>
+    
+      <div>{{ message }}</div>
+
+  </div>
+</div>
+  </template>
+</div>
+
+
+    
+  <include-fragment class="js-notification-shelf-include-fragment" data-base-src="https://github.com/notifications/beta/shelf"></include-fragment>
+
+
+  
+
+
+
+
+  <div
+    class="application-main "
+    data-commit-hovercards-enabled
+    data-discussion-hovercards-enabled
+    data-issue-and-pr-hovercards-enabled
+  >
+        <div itemscope itemtype="http://schema.org/SoftwareSourceCode" class="">
+    <main id="js-repo-pjax-container" >
+      
+  
+
+
+
+
+    
+
+
+
+
+
+    <div id="repository-container-header" class="pt-3 hide-full-screen" style="background-color: var(--color-page-header-bg);" data-turbo-replace>
+
+      <div class="d-flex flex-wrap flex-justify-end mb-3  px-3 px-md-4 px-lg-5" style="gap: 1rem;">
+
+        <div class="flex-auto min-width-0 width-fit mr-3">
+            <div class=" d-flex flex-wrap flex-items-center wb-break-word f3 text-normal">
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo color-fg-muted mr-2">
+    <path fill-rule="evenodd" d="M2 2.5A2.5 2.5 0 014.5 0h8.75a.75.75 0 01.75.75v12.5a.75.75 0 01-.75.75h-2.5a.75.75 0 110-1.5h1.75v-2h-8a1 1 0 00-.714 1.7.75.75 0 01-1.072 1.05A2.495 2.495 0 012 11.5v-9zm10.5-1V9h-8c-.356 0-.694.074-1 .208V2.5a1 1 0 011-1h8zM5 12.25v3.25a.25.25 0 00.4.2l1.45-1.087a.25.25 0 01.3 0L8.6 15.7a.25.25 0 00.4-.2v-3.25a.25.25 0 00-.25-.25h-3.5a.25.25 0 00-.25.25z"></path>
+</svg>
+  
+  <span class="author flex-self-stretch" itemprop="author">
+    <a class="url fn" rel="author" data-hovercard-type="user" data-hovercard-url="/users/sunyinqi0508/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="/sunyinqi0508">sunyinqi0508</a>
+  </span>
+  <span class="mx-1 flex-self-stretch color-fg-muted">/</span>
+  <strong itemprop="name" class="mr-2 flex-self-stretch">
+    <a data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2">AQuery2</a>
+  </strong>
+
+  <span></span><span class="Label Label--secondary v-align-middle mr-1">Public</span>
+</div>
+
+        </div>
+
+          <ul class="pagehead-actions flex-shrink-0 d-none d-md-inline" style="padding: 2px 0;">
+
+      
+
+  <li>
+          <a href="/login?return_to=%2Fsunyinqi0508%2FAQuery2" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;notification subscription menu watch&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="6b93c061a8dbae855802d50c9a09eec41713f9e25811c36a877db94a473668db" aria-label="You must be signed in to change notification settings" data-view-component="true" class="tooltipped tooltipped-s btn-sm btn">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-bell mr-2">
+    <path d="M8 16a2 2 0 001.985-1.75c.017-.137-.097-.25-.235-.25h-3.5c-.138 0-.252.113-.235.25A2 2 0 008 16z"></path><path fill-rule="evenodd" d="M8 1.5A3.5 3.5 0 004.5 5v2.947c0 .346-.102.683-.294.97l-1.703 2.556a.018.018 0 00-.003.01l.001.006c0 .002.002.004.004.006a.017.017 0 00.006.004l.007.001h10.964l.007-.001a.016.016 0 00.006-.004.016.016 0 00.004-.006l.001-.007a.017.017 0 00-.003-.01l-1.703-2.554a1.75 1.75 0 01-.294-.97V5A3.5 3.5 0 008 1.5zM3 5a5 5 0 0110 0v2.947c0 .05.015.098.042.139l1.703 2.555A1.518 1.518 0 0113.482 13H2.518a1.518 1.518 0 01-1.263-2.36l1.703-2.554A.25.25 0 003 7.947V5z"></path>
+</svg>Notifications
+</a>
+  </li>
+
+  <li>
+      
+    <a href="/login?return_to=%2Fsunyinqi0508%2FAQuery2" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;repo details fork button&quot;,&quot;repository_id&quot;:484854813,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="005c8fbe5d7ccdbd3a483f7785097bf350282f2708537c0aaeaa5ea5c4436f10" aria-label="You must be signed in to fork a repository" data-view-component="true" class="tooltipped tooltipped-s btn-sm btn">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-2">
+    <path fill-rule="evenodd" d="M5 3.25a.75.75 0 11-1.5 0 .75.75 0 011.5 0zm0 2.122a2.25 2.25 0 10-1.5 0v.878A2.25 2.25 0 005.75 8.5h1.5v2.128a2.251 2.251 0 101.5 0V8.5h1.5a2.25 2.25 0 002.25-2.25v-.878a2.25 2.25 0 10-1.5 0v.878a.75.75 0 01-.75.75h-4.5A.75.75 0 015 6.25v-.878zm3.75 7.378a.75.75 0 11-1.5 0 .75.75 0 011.5 0zm3-8.75a.75.75 0 100-1.5.75.75 0 000 1.5z"></path>
+</svg>Fork
+    <span id="repo-network-counter" data-pjax-replace="true" data-turbo-replace="true" title="0" data-view-component="true" class="Counter">0</span>
+</a>
+  </li>
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+        <div data-view-component="true" class="BtnGroup d-flex">
+        <a href="/login?return_to=%2Fsunyinqi0508%2FAQuery2" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;star button&quot;,&quot;repository_id&quot;:484854813,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="e6982b84b8074e03ed97e59b303377fc6ba835d696ec0331d01e68ce634bc35e" aria-label="You must be signed in to star a repository" data-view-component="true" class="tooltipped tooltipped-s btn-sm btn BtnGroup-item">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star v-align-text-bottom d-inline-block mr-2">
+    <path fill-rule="evenodd" d="M8 .25a.75.75 0 01.673.418l1.882 3.815 4.21.612a.75.75 0 01.416 1.279l-3.046 2.97.719 4.192a.75.75 0 01-1.088.791L8 12.347l-3.766 1.98a.75.75 0 01-1.088-.79l.72-4.194L.818 6.374a.75.75 0 01.416-1.28l4.21-.611L7.327.668A.75.75 0 018 .25zm0 2.445L6.615 5.5a.75.75 0 01-.564.41l-3.097.45 2.24 2.184a.75.75 0 01.216.664l-.528 3.084 2.769-1.456a.75.75 0 01.698 0l2.77 1.456-.53-3.084a.75.75 0 01.216-.664l2.24-2.183-3.096-.45a.75.75 0 01-.564-.41L8 2.694v.001z"></path>
+</svg><span data-view-component="true" class="d-inline">
+          Star
+</span>          <span id="repo-stars-counter-star" aria-label="0 users starred this repository" data-singular-suffix="user starred this repository" data-plural-suffix="users starred this repository" data-turbo-replace="true" title="0" data-view-component="true" class="Counter js-social-count">0</span>
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+    <path d="M4.427 7.427l3.396 3.396a.25.25 0 00.354 0l3.396-3.396A.25.25 0 0011.396 7H4.604a.25.25 0 00-.177.427z"></path>
+</svg>
+</button></div>
+  </li>
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+
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+      </div>
+
+        <div id="responsive-meta-container" data-turbo-replace>
+      <div class="d-block d-md-none mb-2 px-3 px-md-4 px-lg-5">
+      <p class="f4 mb-3">
+        An in-memory column-store time-series database that uses query compilation
+      </p>
+
+    <h3 class="sr-only">License</h3>
+  <div class="mb-2">
+    <a href="/sunyinqi0508/AQuery2/blob/master/LICENSE"
+      class="Link--muted"
+      
+      data-analytics-event="{&quot;category&quot;:&quot;Repository Overview&quot;,&quot;action&quot;:&quot;click&quot;,&quot;label&quot;:&quot;location:sidebar;file:license&quot;}"
+    >
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+    <path fill-rule="evenodd" d="M8.75.75a.75.75 0 00-1.5 0V2h-.984c-.305 0-.604.08-.869.23l-1.288.737A.25.25 0 013.984 3H1.75a.75.75 0 000 1.5h.428L.066 9.192a.75.75 0 00.154.838l.53-.53-.53.53v.001l.002.002.002.002.006.006.016.015.045.04a3.514 3.514 0 00.686.45A4.492 4.492 0 003 11c.88 0 1.556-.22 2.023-.454a3.515 3.515 0 00.686-.45l.045-.04.016-.015.006-.006.002-.002.001-.002L5.25 9.5l.53.53a.75.75 0 00.154-.838L3.822 4.5h.162c.305 0 .604-.08.869-.23l1.289-.737a.25.25 0 01.124-.033h.984V13h-2.5a.75.75 0 000 1.5h6.5a.75.75 0 000-1.5h-2.5V3.5h.984a.25.25 0 01.124.033l1.29.736c.264.152.563.231.868.231h.162l-2.112 4.692a.75.75 0 00.154.838l.53-.53-.53.53v.001l.002.002.002.002.006.006.016.015.045.04a3.517 3.517 0 00.686.45A4.492 4.492 0 0013 11c.88 0 1.556-.22 2.023-.454a3.512 3.512 0 00.686-.45l.045-.04.01-.01.006-.005.006-.006.002-.002.001-.002-.529-.531.53.53a.75.75 0 00.154-.838L13.823 4.5h.427a.75.75 0 000-1.5h-2.234a.25.25 0 01-.124-.033l-1.29-.736A1.75 1.75 0 009.735 2H8.75V.75zM1.695 9.227c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L3 6.327l-1.305 2.9zm10 0c.285.135.718.273 1.305.273s1.02-.138 1.305-.273L13 6.327l-1.305 2.9z"></path>
+</svg>
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+    <path fill-rule="evenodd" d="M8 .25a.75.75 0 01.673.418l1.882 3.815 4.21.612a.75.75 0 01.416 1.279l-3.046 2.97.719 4.192a.75.75 0 01-1.088.791L8 12.347l-3.766 1.98a.75.75 0 01-1.088-.79l.72-4.194L.818 6.374a.75.75 0 01.416-1.28l4.21-.611L7.327.668A.75.75 0 018 .25zm0 2.445L6.615 5.5a.75.75 0 01-.564.41l-3.097.45 2.24 2.184a.75.75 0 01.216.664l-.528 3.084 2.769-1.456a.75.75 0 01.698 0l2.77 1.456-.53-3.084a.75.75 0 01.216-.664l2.24-2.183-3.096-.45a.75.75 0 01-.564-.41L8 2.694v.001z"></path>
+</svg>
+        <span class="text-bold">0</span>
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+</svg>
+        <span class="text-bold">0</span>
+        forks
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+          <div data-view-component="true" class="BtnGroup d-flex">
+        <a href="/login?return_to=%2Fsunyinqi0508%2FAQuery2" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;star button&quot;,&quot;repository_id&quot;:484854813,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="e6982b84b8074e03ed97e59b303377fc6ba835d696ec0331d01e68ce634bc35e" aria-label="You must be signed in to star a repository" data-view-component="true" class="tooltipped tooltipped-s btn-sm btn btn-block BtnGroup-item">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star v-align-text-bottom d-inline-block mr-2">
+    <path fill-rule="evenodd" d="M8 .25a.75.75 0 01.673.418l1.882 3.815 4.21.612a.75.75 0 01.416 1.279l-3.046 2.97.719 4.192a.75.75 0 01-1.088.791L8 12.347l-3.766 1.98a.75.75 0 01-1.088-.79l.72-4.194L.818 6.374a.75.75 0 01.416-1.28l4.21-.611L7.327.668A.75.75 0 018 .25zm0 2.445L6.615 5.5a.75.75 0 01-.564.41l-3.097.45 2.24 2.184a.75.75 0 01.216.664l-.528 3.084 2.769-1.456a.75.75 0 01.698 0l2.77 1.456-.53-3.084a.75.75 0 01.216-.664l2.24-2.183-3.096-.45a.75.75 0 01-.564-.41L8 2.694v.001z"></path>
+</svg><span data-view-component="true" class="d-inline">
+          Star
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+    <path d="M4.427 7.427l3.396 3.396a.25.25 0 00.354 0l3.396-3.396A.25.25 0 0011.396 7H4.604a.25.25 0 00-.177.427z"></path>
+</svg>
+</button></div>
+      </div>
+      <div class="flex-1">
+            <a href="/login?return_to=%2Fsunyinqi0508%2FAQuery2" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;notification subscription menu watch&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="6b93c061a8dbae855802d50c9a09eec41713f9e25811c36a877db94a473668db" aria-label="You must be signed in to change notification settings" data-view-component="true" class="tooltipped tooltipped-s btn-sm btn btn-block">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-bell mr-2">
+    <path d="M8 16a2 2 0 001.985-1.75c.017-.137-.097-.25-.235-.25h-3.5c-.138 0-.252.113-.235.25A2 2 0 008 16z"></path><path fill-rule="evenodd" d="M8 1.5A3.5 3.5 0 004.5 5v2.947c0 .346-.102.683-.294.97l-1.703 2.556a.018.018 0 00-.003.01l.001.006c0 .002.002.004.004.006a.017.017 0 00.006.004l.007.001h10.964l.007-.001a.016.016 0 00.006-.004.016.016 0 00.004-.006l.001-.007a.017.017 0 00-.003-.01l-1.703-2.554a1.75 1.75 0 01-.294-.97V5A3.5 3.5 0 008 1.5zM3 5a5 5 0 0110 0v2.947c0 .05.015.098.042.139l1.703 2.555A1.518 1.518 0 0113.482 13H2.518a1.518 1.518 0 01-1.263-2.36l1.703-2.554A.25.25 0 003 7.947V5z"></path>
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+</a></li>
+      <li data-view-component="true" class="d-inline-flex">
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+
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+              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-git-pull-request UnderlineNav-octicon d-none d-sm-inline">
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+        <span data-content="Actions">Actions</span>
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+
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+      <li data-view-component="true" class="d-inline-flex">
+  <a id="projects-tab" href="/sunyinqi0508/AQuery2/projects" data-tab-item="i4projects-tab" data-selected-links="repo_projects new_repo_project repo_project /sunyinqi0508/AQuery2/projects" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" data-hotkey="g b" data-analytics-event="{&quot;category&quot;:&quot;Underline navbar&quot;,&quot;action&quot;:&quot;Click tab&quot;,&quot;label&quot;:&quot;Projects&quot;,&quot;target&quot;:&quot;UNDERLINE_NAV.TAB&quot;}" data-view-component="true" class="UnderlineNav-item no-wrap js-responsive-underlinenav-item js-selected-navigation-item">
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+        <span data-content="Projects">Projects</span>
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+      <li data-view-component="true" class="d-inline-flex">
+  <a id="security-tab" href="/sunyinqi0508/AQuery2/security" data-tab-item="i5security-tab" data-selected-links="security overview alerts policy token_scanning code_scanning /sunyinqi0508/AQuery2/security" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" data-hotkey="g s" data-analytics-event="{&quot;category&quot;:&quot;Underline navbar&quot;,&quot;action&quot;:&quot;Click tab&quot;,&quot;label&quot;:&quot;Security&quot;,&quot;target&quot;:&quot;UNDERLINE_NAV.TAB&quot;}" data-view-component="true" class="UnderlineNav-item no-wrap js-responsive-underlinenav-item js-selected-navigation-item">
+    
+              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-shield UnderlineNav-octicon d-none d-sm-inline">
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+</a></li>
+      <li data-view-component="true" class="d-inline-flex">
+  <a id="insights-tab" href="/sunyinqi0508/AQuery2/pulse" data-tab-item="i6insights-tab" data-selected-links="repo_graphs repo_contributors dependency_graph dependabot_updates pulse people community /sunyinqi0508/AQuery2/pulse" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" data-analytics-event="{&quot;category&quot;:&quot;Underline navbar&quot;,&quot;action&quot;:&quot;Click tab&quot;,&quot;label&quot;:&quot;Insights&quot;,&quot;target&quot;:&quot;UNDERLINE_NAV.TAB&quot;}" data-view-component="true" class="UnderlineNav-item no-wrap js-responsive-underlinenav-item js-selected-navigation-item">
+    
+              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-graph UnderlineNav-octicon d-none d-sm-inline">
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+          <span id="insights-repo-tab-count" data-pjax-replace="" data-turbo-replace="" title="Not available" data-view-component="true" class="Counter"></span>
+
+
+    
+</a></li>
+</ul>
+    <div style="visibility:hidden;" data-view-component="true" class="UnderlineNav-actions js-responsive-underlinenav-overflow position-absolute pr-3 pr-md-4 pr-lg-5 right-0">      <details data-view-component="true" class="details-overlay details-reset position-relative">
+  <summary role="button" data-view-component="true">          <div class="UnderlineNav-item mr-0 border-0">
+            <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-kebab-horizontal">
+    <path d="M8 9a1.5 1.5 0 100-3 1.5 1.5 0 000 3zM1.5 9a1.5 1.5 0 100-3 1.5 1.5 0 000 3zm13 0a1.5 1.5 0 100-3 1.5 1.5 0 000 3z"></path>
+</svg>
+            <span class="sr-only">More</span>
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+</summary>
+  <div data-view-component="true">          <details-menu role="menu" data-view-component="true" class="dropdown-menu dropdown-menu-sw">
+  
+            <ul>
+                <li data-menu-item="i0code-tab" hidden>
+                  <a role="menuitem" class="js-selected-navigation-item selected dropdown-item" aria-current="page" data-selected-links="repo_source repo_downloads repo_commits repo_releases repo_tags repo_branches repo_packages repo_deployments /sunyinqi0508/AQuery2" href="/sunyinqi0508/AQuery2">
+                    Code
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+                  <a role="menuitem" class="js-selected-navigation-item dropdown-item" data-selected-links="repo_issues repo_labels repo_milestones /sunyinqi0508/AQuery2/issues" href="/sunyinqi0508/AQuery2/issues">
+                    Issues
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+                <li data-menu-item="i2pull-requests-tab" hidden>
+                  <a role="menuitem" class="js-selected-navigation-item dropdown-item" data-selected-links="repo_pulls checks /sunyinqi0508/AQuery2/pulls" href="/sunyinqi0508/AQuery2/pulls">
+                    Pull requests
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+                <li data-menu-item="i3actions-tab" hidden>
+                  <a role="menuitem" class="js-selected-navigation-item dropdown-item" data-selected-links="repo_actions /sunyinqi0508/AQuery2/actions" href="/sunyinqi0508/AQuery2/actions">
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+                <li data-menu-item="i4projects-tab" hidden>
+                  <a role="menuitem" class="js-selected-navigation-item dropdown-item" data-selected-links="repo_projects new_repo_project repo_project /sunyinqi0508/AQuery2/projects" href="/sunyinqi0508/AQuery2/projects">
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+                  <a role="menuitem" class="js-selected-navigation-item dropdown-item" data-selected-links="security overview alerts policy token_scanning code_scanning /sunyinqi0508/AQuery2/security" href="/sunyinqi0508/AQuery2/security">
+                    Security
+</a>                </li>
+                <li data-menu-item="i6insights-tab" hidden>
+                  <a role="menuitem" class="js-selected-navigation-item dropdown-item" data-selected-links="repo_graphs repo_contributors dependency_graph dependabot_updates pulse people community /sunyinqi0508/AQuery2/pulse" href="/sunyinqi0508/AQuery2/pulse">
+                    Insights
+</a>                </li>
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+
+</details-menu></div>
+</details></div>
+</nav>
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+  <turbo-frame id="repo-content-turbo-frame" target="_top" data-turbo-action="advance" class="">
+      <div id="repo-content-pjax-container" class="repository-content " >
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+
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+    
+      
+  <h1 class='sr-only'>sunyinqi0508/AQuery2</h1>
+  <div class="clearfix container-xl px-3 px-md-4 px-lg-5 mt-4">
+    
+
+<div>
+  
+
+  <div class="d-none d-lg-block mt-6 mr-3 Popover top-0 right-0 color-shadow-medium col-3">
+    
+  </div>
+
+  <div id="spoof-warning" class="mt-0 pb-3" hidden aria-hidden>
+  <div data-view-component="true" class="flash flash-warn mt-0 clearfix">
+  
+  
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert float-left mt-1">
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+</svg>
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+      <div class="overflow-hidden">This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.</div>
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+  <include-fragment src="/sunyinqi0508/AQuery2/spoofed_commit_check/3229a54bd41e14e0e626664c6e7e9d02d32716af" data-test-selector="spoofed-commit-check"></include-fragment>
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+  <div data-view-component="true" class="Layout Layout--flowRow-until-md Layout--sidebarPosition-end Layout--sidebarPosition-flowRow-end">
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+<div class="position-relative">
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+    class="js-branch-select-menu details-reset details-overlay mr-0 mb-0 "
+    id="branch-select-menu"
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+            data-hotkey="w"
+            title="Switch branches or tags">
+      <svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-git-branch">
+    <path fill-rule="evenodd" d="M11.75 2.5a.75.75 0 100 1.5.75.75 0 000-1.5zm-2.25.75a2.25 2.25 0 113 2.122V6A2.5 2.5 0 0110 8.5H6a1 1 0 00-1 1v1.128a2.251 2.251 0 11-1.5 0V5.372a2.25 2.25 0 111.5 0v1.836A2.492 2.492 0 016 7h4a1 1 0 001-1v-.628A2.25 2.25 0 019.5 3.25zM4.25 12a.75.75 0 100 1.5.75.75 0 000-1.5zM3.5 3.25a.75.75 0 111.5 0 .75.75 0 01-1.5 0z"></path>
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+      <span class="css-truncate-target" data-menu-button>master</span>
+      <span class="dropdown-caret"></span>
+    </summary>
+
+    
+<div class="SelectMenu">
+  <div class="SelectMenu-modal">
+    <header class="SelectMenu-header">
+      <span class="SelectMenu-title">Switch branches/tags</span>
+      <button class="SelectMenu-closeButton" type="button" data-toggle-for="branch-select-menu"><svg aria-label="Close menu" aria-hidden="false" role="img" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x">
+    <path fill-rule="evenodd" d="M3.72 3.72a.75.75 0 011.06 0L8 6.94l3.22-3.22a.75.75 0 111.06 1.06L9.06 8l3.22 3.22a.75.75 0 11-1.06 1.06L8 9.06l-3.22 3.22a.75.75 0 01-1.06-1.06L6.94 8 3.72 4.78a.75.75 0 010-1.06z"></path>
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+    <input-demux data-action="tab-container-change:input-demux#storeInput tab-container-changed:input-demux#updateInput">
+      <tab-container class="d-flex flex-column js-branches-tags-tabs" style="min-height: 0;">
+        <div class="SelectMenu-filter">
+          <input data-target="input-demux.source"
+                 id="context-commitish-filter-field"
+                 class="SelectMenu-input form-control"
+                 aria-owns="ref-list-branches"
+                 data-controls-ref-menu-id="ref-list-branches"
+                 autofocus
+                 autocomplete="off"
+                 aria-label="Filter branches/tags"
+                 placeholder="Filter branches/tags"
+                 type="text"
+          >
+        </div>
+
+        <div class="SelectMenu-tabs" role="tablist" data-target="input-demux.control" >
+          <button class="SelectMenu-tab" type="button" role="tab" aria-selected="true">Branches</button>
+          <button class="SelectMenu-tab" type="button" role="tab">Tags</button>
+        </div>
+
+        <div role="tabpanel" id="ref-list-branches" data-filter-placeholder="Filter branches/tags" tabindex="" class="d-flex flex-column flex-auto overflow-auto">
+          <ref-selector
+            type="branch"
+            data-targets="input-demux.sinks"
+            data-action="
+              input-entered:ref-selector#inputEntered
+              tab-selected:ref-selector#tabSelected
+              focus-list:ref-selector#focusFirstListMember
+            "
+            query-endpoint="/sunyinqi0508/AQuery2/refs"
+            
+            cache-key="v0:1650747537.7822988"
+            current-committish="bWFzdGVy"
+            default-branch="bWFzdGVy"
+            name-with-owner="c3VueWlucWkwNTA4L0FRdWVyeTI="
+            prefetch-on-mouseover
+          >
+
+            <template data-target="ref-selector.fetchFailedTemplate">
+              <div class="SelectMenu-message" data-index="{{ index }}">Could not load branches</div>
+            </template>
+
+              <template data-target="ref-selector.noMatchTemplate">
+    <div class="SelectMenu-message">Nothing to show</div>
+</template>
+
+
+            <div data-target="ref-selector.listContainer" role="menu" class="SelectMenu-list " data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame">
+              <div class="SelectMenu-loading pt-3 pb-0 overflow-hidden" aria-label="Menu is loading">
+                <svg style="box-sizing: content-box; color: var(--color-icon-primary);" width="32" height="32" viewBox="0 0 16 16" fill="none" data-view-component="true" class="anim-rotate">
+  <circle cx="8" cy="8" r="7" stroke="currentColor" stroke-opacity="0.25" stroke-width="2" vector-effect="non-scaling-stroke" />
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+</svg>
+              </div>
+            </div>
+
+              <template data-target="ref-selector.itemTemplate">
+  <a href="https://github.com/sunyinqi0508/AQuery2/tree/{{ urlEncodedRefName }}" class="SelectMenu-item" role="menuitemradio" rel="nofollow" aria-checked="{{ isCurrent }}" data-index="{{ index }}">
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check">
+    <path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path>
+</svg>
+    <span class="flex-1 css-truncate css-truncate-overflow {{ isFilteringClass }}">{{ refName }}</span>
+    <span hidden="{{ isNotDefault }}" class="Label Label--secondary flex-self-start">default</span>
+  </a>
+</template>
+
+
+              <footer class="SelectMenu-footer"><a href="/sunyinqi0508/AQuery2/branches">View all branches</a></footer>
+          </ref-selector>
+
+        </div>
+
+        <div role="tabpanel" id="tags-menu" data-filter-placeholder="Find a tag" tabindex="" hidden class="d-flex flex-column flex-auto overflow-auto">
+          <ref-selector
+            type="tag"
+            data-action="
+              input-entered:ref-selector#inputEntered
+              tab-selected:ref-selector#tabSelected
+              focus-list:ref-selector#focusFirstListMember
+            "
+            data-targets="input-demux.sinks"
+            query-endpoint="/sunyinqi0508/AQuery2/refs"
+            cache-key="v0:1650747537.7822988"
+            current-committish="bWFzdGVy"
+            default-branch="bWFzdGVy"
+            name-with-owner="c3VueWlucWkwNTA4L0FRdWVyeTI="
+          >
+
+            <template data-target="ref-selector.fetchFailedTemplate">
+              <div class="SelectMenu-message" data-index="{{ index }}">Could not load tags</div>
+            </template>
+
+            <template data-target="ref-selector.noMatchTemplate">
+              <div class="SelectMenu-message" data-index="{{ index }}">Nothing to show</div>
+            </template>
+
+              <template data-target="ref-selector.itemTemplate">
+  <a href="https://github.com/sunyinqi0508/AQuery2/tree/{{ urlEncodedRefName }}" class="SelectMenu-item" role="menuitemradio" rel="nofollow" aria-checked="{{ isCurrent }}" data-index="{{ index }}">
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check SelectMenu-icon SelectMenu-icon--check">
+    <path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path>
+</svg>
+    <span class="flex-1 css-truncate css-truncate-overflow {{ isFilteringClass }}">{{ refName }}</span>
+    <span hidden="{{ isNotDefault }}" class="Label Label--secondary flex-self-start">default</span>
+  </a>
+</template>
+
+
+            <div data-target="ref-selector.listContainer" role="menu" class="SelectMenu-list" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame">
+              <div class="SelectMenu-loading pt-3 pb-0 overflow-hidden" aria-label="Menu is loading">
+                <svg style="box-sizing: content-box; color: var(--color-icon-primary);" width="32" height="32" viewBox="0 0 16 16" fill="none" data-view-component="true" class="anim-rotate">
+  <circle cx="8" cy="8" r="7" stroke="currentColor" stroke-opacity="0.25" stroke-width="2" vector-effect="non-scaling-stroke" />
+  <path d="M15 8a7.002 7.002 0 00-7-7" stroke="currentColor" stroke-width="2" stroke-linecap="round" vector-effect="non-scaling-stroke" />
+</svg>
+              </div>
+            </div>
+              <footer class="SelectMenu-footer"><a href="/sunyinqi0508/AQuery2/tags">View all tags</a></footer>
+          </ref-selector>
+        </div>
+      </tab-container>
+    </input-demux>
+  </div>
+</div>
+
+  </details>
+
+</div>
+
+
+  <div class="flex-self-center flex-self-stretch d-none d-lg-flex flex-items-center lh-condensed-ultra">
+    <a data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2/branches" class="ml-3 Link--primary no-underline">
+          <svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-git-branch">
+    <path fill-rule="evenodd" d="M11.75 2.5a.75.75 0 100 1.5.75.75 0 000-1.5zm-2.25.75a2.25 2.25 0 113 2.122V6A2.5 2.5 0 0110 8.5H6a1 1 0 00-1 1v1.128a2.251 2.251 0 11-1.5 0V5.372a2.25 2.25 0 111.5 0v1.836A2.492 2.492 0 016 7h4a1 1 0 001-1v-.628A2.25 2.25 0 019.5 3.25zM4.25 12a.75.75 0 100 1.5.75.75 0 000-1.5zM3.5 3.25a.75.75 0 111.5 0 .75.75 0 01-1.5 0z"></path>
+</svg>
+          <strong>1</strong>
+          <span class="color-fg-muted">branch</span>
+    </a>
+    <a data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2/tags" class="ml-3 Link--primary no-underline">
+      <svg text="gray" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-tag">
+    <path fill-rule="evenodd" d="M2.5 7.775V2.75a.25.25 0 01.25-.25h5.025a.25.25 0 01.177.073l6.25 6.25a.25.25 0 010 .354l-5.025 5.025a.25.25 0 01-.354 0l-6.25-6.25a.25.25 0 01-.073-.177zm-1.5 0V2.75C1 1.784 1.784 1 2.75 1h5.025c.464 0 .91.184 1.238.513l6.25 6.25a1.75 1.75 0 010 2.474l-5.026 5.026a1.75 1.75 0 01-2.474 0l-6.25-6.25A1.75 1.75 0 011 7.775zM6 5a1 1 0 100 2 1 1 0 000-2z"></path>
+</svg>
+        <strong>0</strong>
+        <span class="color-fg-muted">tags</span>
+    </a>
+  </div>
+
+  <div class="flex-auto"></div>
+
+  <include-fragment data-test-selector="overview-actions-fragment" src="/sunyinqi0508/AQuery2/overview_actions/master"></include-fragment>
+
+
+    <span class="d-none d-md-flex ml-2">
+      
+<get-repo class="">
+    
+    <details class="position-relative details-overlay details-reset js-codespaces-details-container"
+             data-action="toggle:get-repo#onDetailsToggle"
+             
+    >
+        <summary data-hydro-click="{&quot;event_type&quot;:&quot;repository.click&quot;,&quot;payload&quot;:{&quot;repository_id&quot;:484854813,&quot;target&quot;:&quot;CLONE_OR_DOWNLOAD_BUTTON&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="4abb215d5afa16329b6cc13dec5434afde0dc26e3e86e59c7252967e35ddc7d5" data-view-component="true" class="btn-primary btn">    Code<span class="dropdown-caret"></span>
+</summary>      <div class="position-relative">
+        <div class="dropdown-menu dropdown-menu-sw p-0" style="top:6px;width:378px;">
+          <div
+  data-target="get-repo.modal"
+  
+>
+    <ul class="list-style-none">
+        <li class="Box-row p-3">
+  <a class="Link--muted float-right tooltipped tooltipped-s" href="https://docs.github.com/articles/which-remote-url-should-i-use" target="_blank" aria-label="Which remote URL should I use?">
+  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-question">
+    <path fill-rule="evenodd" d="M8 1.5a6.5 6.5 0 100 13 6.5 6.5 0 000-13zM0 8a8 8 0 1116 0A8 8 0 010 8zm9 3a1 1 0 11-2 0 1 1 0 012 0zM6.92 6.085c.081-.16.19-.299.34-.398.145-.097.371-.187.74-.187.28 0 .553.087.738.225A.613.613 0 019 6.25c0 .177-.04.264-.077.318a.956.956 0 01-.277.245c-.076.051-.158.1-.258.161l-.007.004a7.728 7.728 0 00-.313.195 2.416 2.416 0 00-.692.661.75.75 0 001.248.832.956.956 0 01.276-.245 6.3 6.3 0 01.26-.16l.006-.004c.093-.057.204-.123.313-.195.222-.149.487-.355.692-.662.214-.32.329-.702.329-1.15 0-.76-.36-1.348-.863-1.725A2.76 2.76 0 008 4c-.631 0-1.155.16-1.572.438-.413.276-.68.638-.849.977a.75.75 0 101.342.67z"></path>
+</svg>
+</a>
+
+<div class="text-bold">
+  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-terminal mr-2">
+    <path fill-rule="evenodd" d="M0 2.75C0 1.784.784 1 1.75 1h12.5c.966 0 1.75.784 1.75 1.75v10.5A1.75 1.75 0 0114.25 15H1.75A1.75 1.75 0 010 13.25V2.75zm1.75-.25a.25.25 0 00-.25.25v10.5c0 .138.112.25.25.25h12.5a.25.25 0 00.25-.25V2.75a.25.25 0 00-.25-.25H1.75zM7.25 8a.75.75 0 01-.22.53l-2.25 2.25a.75.75 0 11-1.06-1.06L5.44 8 3.72 6.28a.75.75 0 111.06-1.06l2.25 2.25c.141.14.22.331.22.53zm1.5 1.5a.75.75 0 000 1.5h3a.75.75 0 000-1.5h-3z"></path>
+</svg>
+  Clone
+</div>
+
+<tab-container>
+
+  <div class="UnderlineNav my-2 box-shadow-none">
+    <div class="UnderlineNav-body" role="tablist">
+          <button name="button" type="button" role="tab" class="UnderlineNav-item" aria-selected="true" data-hydro-click="{&quot;event_type&quot;:&quot;clone_or_download.click&quot;,&quot;payload&quot;:{&quot;feature_clicked&quot;:&quot;USE_HTTPS&quot;,&quot;git_repository_type&quot;:&quot;REPOSITORY&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="2099e8e1c2be1eaf8baaf18fea085ac0d3805897cf0c1180e7d6f2bdec0e706b">
+            HTTPS
+</button>          <button name="button" type="button" role="tab" class="UnderlineNav-item" data-hydro-click="{&quot;event_type&quot;:&quot;clone_or_download.click&quot;,&quot;payload&quot;:{&quot;feature_clicked&quot;:&quot;USE_GH_CLI&quot;,&quot;git_repository_type&quot;:&quot;REPOSITORY&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="bde8d1871ff48da7440709d492ba78a363eebf557433c9116e112205b7b272da">
+            GitHub CLI
+</button>    </div>
+  </div>
+
+  <div role="tabpanel">
+    <div class="input-group">
+  <input type="text" class="form-control input-monospace input-sm color-bg-subtle" data-autoselect value="https://github.com/sunyinqi0508/AQuery2.git" aria-label="https://github.com/sunyinqi0508/AQuery2.git" readonly>
+  <div class="input-group-button">
+    <clipboard-copy value="https://github.com/sunyinqi0508/AQuery2.git" aria-label="Copy to clipboard" class="btn btn-sm js-clipboard-copy tooltipped-no-delay ClipboardButton js-clone-url-http" data-copy-feedback="Copied!" data-tooltip-direction="n" data-hydro-click="{&quot;event_type&quot;:&quot;clone_or_download.click&quot;,&quot;payload&quot;:{&quot;feature_clicked&quot;:&quot;COPY_URL&quot;,&quot;git_repository_type&quot;:&quot;REPOSITORY&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="6b6a6cb7881564c7fc3e6c65e205c4fad1e40682df965f3bddd1ab0bf8bce67c"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy js-clipboard-copy-icon d-inline-block">
+    <path fill-rule="evenodd" d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 010 1.5h-1.5a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-1.5a.75.75 0 011.5 0v1.5A1.75 1.75 0 019.25 16h-7.5A1.75 1.75 0 010 14.25v-7.5z"></path><path fill-rule="evenodd" d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0114.25 11h-7.5A1.75 1.75 0 015 9.25v-7.5zm1.75-.25a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-7.5a.25.25 0 00-.25-.25h-7.5z"></path>
+</svg><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check js-clipboard-check-icon color-fg-success d-inline-block d-sm-none">
+    <path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path>
+</svg></clipboard-copy>
+  </div>
+</div>
+
+    <p class="mt-2 mb-0 f6 color-fg-muted">
+        Use Git or checkout with SVN using the web URL.
+    </p>
+  </div>
+
+
+  <div role="tabpanel" hidden>
+    <div class="input-group">
+  <input type="text" class="form-control input-monospace input-sm color-bg-subtle" data-autoselect value="gh repo clone sunyinqi0508/AQuery2" aria-label="gh repo clone sunyinqi0508/AQuery2" readonly>
+  <div class="input-group-button">
+    <clipboard-copy value="gh repo clone sunyinqi0508/AQuery2" aria-label="Copy to clipboard" class="btn btn-sm js-clipboard-copy tooltipped-no-delay ClipboardButton js-clone-url-gh-cli" data-copy-feedback="Copied!" data-tooltip-direction="n" data-hydro-click="{&quot;event_type&quot;:&quot;clone_or_download.click&quot;,&quot;payload&quot;:{&quot;feature_clicked&quot;:&quot;COPY_URL&quot;,&quot;git_repository_type&quot;:&quot;REPOSITORY&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="6b6a6cb7881564c7fc3e6c65e205c4fad1e40682df965f3bddd1ab0bf8bce67c"><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copy js-clipboard-copy-icon d-inline-block">
+    <path fill-rule="evenodd" d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 010 1.5h-1.5a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-1.5a.75.75 0 011.5 0v1.5A1.75 1.75 0 019.25 16h-7.5A1.75 1.75 0 010 14.25v-7.5z"></path><path fill-rule="evenodd" d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0114.25 11h-7.5A1.75 1.75 0 015 9.25v-7.5zm1.75-.25a.25.25 0 00-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 00.25-.25v-7.5a.25.25 0 00-.25-.25h-7.5z"></path>
+</svg><svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-check js-clipboard-check-icon color-fg-success d-inline-block d-sm-none">
+    <path fill-rule="evenodd" d="M13.78 4.22a.75.75 0 010 1.06l-7.25 7.25a.75.75 0 01-1.06 0L2.22 9.28a.75.75 0 011.06-1.06L6 10.94l6.72-6.72a.75.75 0 011.06 0z"></path>
+</svg></clipboard-copy>
+  </div>
+</div>
+
+    <p class="mt-2 mb-0 f6 color-fg-muted">
+      Work fast with our official CLI.
+      <a href="https://cli.github.com" target="_blank">Learn more</a>.
+    </p>
+  </div>
+</tab-container>
+
+</li>
+<li data-platforms="windows,mac" class="Box-row Box-row--hover-gray p-3 mt-0 rounded-0 js-remove-unless-platform">
+  <a class="d-flex flex-items-center color-fg-default text-bold no-underline" data-hydro-click="{&quot;event_type&quot;:&quot;clone_or_download.click&quot;,&quot;payload&quot;:{&quot;feature_clicked&quot;:&quot;OPEN_IN_DESKTOP&quot;,&quot;git_repository_type&quot;:&quot;REPOSITORY&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="927f99afc018dda509deb0512351ce17fcf26522547814e37f182cd9adab9390" data-action="click:get-repo#showDownloadMessage" href="https://desktop.github.com">
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-desktop-download mr-2">
+    <path d="M4.927 5.427l2.896 2.896a.25.25 0 00.354 0l2.896-2.896A.25.25 0 0010.896 5H8.75V.75a.75.75 0 10-1.5 0V5H5.104a.25.25 0 00-.177.427z"></path><path d="M1.573 2.573a.25.25 0 00-.073.177v7.5a.25.25 0 00.25.25h12.5a.25.25 0 00.25-.25v-7.5a.25.25 0 00-.25-.25h-3a.75.75 0 110-1.5h3A1.75 1.75 0 0116 2.75v7.5A1.75 1.75 0 0114.25 12h-3.727c.099 1.041.52 1.872 1.292 2.757A.75.75 0 0111.25 16h-6.5a.75.75 0 01-.565-1.243c.772-.885 1.192-1.716 1.292-2.757H1.75A1.75 1.75 0 010 10.25v-7.5A1.75 1.75 0 011.75 1h3a.75.75 0 010 1.5h-3a.25.25 0 00-.177.073zM6.982 12a5.72 5.72 0 01-.765 2.5h3.566a5.72 5.72 0 01-.765-2.5H6.982z"></path>
+</svg>
+    Open with GitHub Desktop
+</a></li>
+<li class="Box-row Box-row--hover-gray p-3 mt-0" >
+  <a class="d-flex flex-items-center color-fg-default text-bold no-underline" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;clone_or_download.click&quot;,&quot;payload&quot;:{&quot;feature_clicked&quot;:&quot;DOWNLOAD_ZIP&quot;,&quot;git_repository_type&quot;:&quot;REPOSITORY&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="910c493cd0df194cc318c90f35b089c5b906c0a2816bc5ebacc79bcf4473a6de" data-ga-click="Repository, download zip, location:repo overview" data-open-app="link" href="/sunyinqi0508/AQuery2/archive/refs/heads/master.zip">
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file-zip mr-2">
+    <path fill-rule="evenodd" d="M3.5 1.75a.25.25 0 01.25-.25h3a.75.75 0 000 1.5h.5a.75.75 0 000-1.5h2.086a.25.25 0 01.177.073l2.914 2.914a.25.25 0 01.073.177v8.586a.25.25 0 01-.25.25h-.5a.75.75 0 000 1.5h.5A1.75 1.75 0 0014 13.25V4.664c0-.464-.184-.909-.513-1.237L10.573.513A1.75 1.75 0 009.336 0H3.75A1.75 1.75 0 002 1.75v11.5c0 .649.353 1.214.874 1.515a.75.75 0 10.752-1.298.25.25 0 01-.126-.217V1.75zM8.75 3a.75.75 0 000 1.5h.5a.75.75 0 000-1.5h-.5zM6 5.25a.75.75 0 01.75-.75h.5a.75.75 0 010 1.5h-.5A.75.75 0 016 5.25zm2 1.5A.75.75 0 018.75 6h.5a.75.75 0 010 1.5h-.5A.75.75 0 018 6.75zm-1.25.75a.75.75 0 000 1.5h.5a.75.75 0 000-1.5h-.5zM8 9.75A.75.75 0 018.75 9h.5a.75.75 0 010 1.5h-.5A.75.75 0 018 9.75zm-.75.75a1.75 1.75 0 00-1.75 1.75v3c0 .414.336.75.75.75h2.5a.75.75 0 00.75-.75v-3a1.75 1.75 0 00-1.75-1.75h-.5zM7 12.25a.25.25 0 01.25-.25h.5a.25.25 0 01.25.25v2.25H7v-2.25z"></path>
+</svg>
+    Download ZIP
+</a></li>
+
+    </ul>
+</div>
+
+
+<div class="p-3" data-targets="get-repo.platforms" data-platform="mac" hidden>
+  <h4 class="lh-condensed mb-3">Launching GitHub Desktop<span class="AnimatedEllipsis"></span></h4>
+  <p class="color-fg-muted">
+    If nothing happens, <a href="https://desktop.github.com/">download GitHub Desktop</a> and try again.
+  </p>
+    <button data-action="click:get-repo#onDetailsToggle" type="button" data-view-component="true" class="btn-link">
+</button>
+</div>
+<div class="p-3" data-targets="get-repo.platforms" data-platform="windows" hidden>
+  <h4 class="lh-condensed mb-3">Launching GitHub Desktop<span class="AnimatedEllipsis"></span></h4>
+  <p class="color-fg-muted">
+    If nothing happens, <a href="https://desktop.github.com/">download GitHub Desktop</a> and try again.
+  </p>
+    <button data-action="click:get-repo#onDetailsToggle" type="button" data-view-component="true" class="btn-link">
+</button>
+</div>
+<div class="p-3" data-targets="get-repo.platforms" data-platform="xcode" hidden>
+  <h4 class="lh-condensed mb-3">Launching Xcode<span class="AnimatedEllipsis"></span></h4>
+  <p class="color-fg-muted">
+    If nothing happens, <a href="https://developer.apple.com/xcode/">download Xcode</a> and try again.
+  </p>
+    <button data-action="click:get-repo#onDetailsToggle" type="button" data-view-component="true" class="btn-link">
+</button>
+</div>
+<div class="p-3 " data-targets="get-repo.platforms" data-target="new-codespace.loadingVscode create-button.loadingVscode" data-platform="vscode" hidden>
+  <poll-include-fragment data-target="get-repo.vscodePoller new-codespace.vscodePoller create-button.vscodePoller">
+    <h4 class="lh-condensed mb-3">Launching Visual Studio Code<span class="AnimatedEllipsis" data-hide-on-error></span></h4>
+    <p class="color-fg-muted" data-hide-on-error>Your codespace will open once ready.</p>
+    <p class="color-fg-muted" data-show-on-error hidden>There was a problem preparing your codespace, please try again.</p>
+  </poll-include-fragment>
+</div>
+
+
+        </div>
+      </div>
+    </details>
+
+</get-repo>
+
+        
+    </span>
+</div>
+
+
+
+      
+
+
+<div class="Box mb-3">
+  <div class="Box-header position-relative">
+    <h2 class="sr-only">Latest commit</h2>
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+          <div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
+              <svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-fg-muted">
+    <path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 00.25-.25V6h-2.75A1.75 1.75 0 019 4.25V1.5H3.75zm6.75.062V4.25c0 .138.112.25.25.25h2.688a.252.252 0 00-.011-.013l-2.914-2.914a.272.272 0 00-.013-.011zM2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0113.25 16h-9.5A1.75 1.75 0 012 14.25V1.75z"></path>
+</svg>
+          </div>
+
+          <div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
+            <span class="css-truncate css-truncate-target d-block width-fit"><a class="js-navigation-open Link--primary" title="mmw.cpp" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2/blob/master/mmw.cpp">mmw.cpp</a></span>
+          </div>
+
+          <div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
+              <div class="Skeleton Skeleton--text col-7">&nbsp;</div>
+          </div>
+
+          <div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
+              <div class="Skeleton Skeleton--text">&nbsp;</div>
+          </div>
+
+        </div>
+        <div role="row" class="Box-row Box-row--focus-gray py-2 d-flex position-relative js-navigation-item ">
+          <div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
+              <svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-fg-muted">
+    <path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 00.25-.25V6h-2.75A1.75 1.75 0 019 4.25V1.5H3.75zm6.75.062V4.25c0 .138.112.25.25.25h2.688a.252.252 0 00-.011-.013l-2.914-2.914a.272.272 0 00-.013-.011zM2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0113.25 16h-9.5A1.75 1.75 0 012 14.25V1.75z"></path>
+</svg>
+          </div>
+
+          <div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
+            <span class="css-truncate css-truncate-target d-block width-fit"><a class="js-navigation-open Link--primary" title="prompt.py" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2/blob/master/prompt.py">prompt.py</a></span>
+          </div>
+
+          <div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
+              <div class="Skeleton Skeleton--text col-7">&nbsp;</div>
+          </div>
+
+          <div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
+              <div class="Skeleton Skeleton--text">&nbsp;</div>
+          </div>
+
+        </div>
+        <div role="row" class="Box-row Box-row--focus-gray py-2 d-flex position-relative js-navigation-item ">
+          <div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
+              <svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-fg-muted">
+    <path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 00.25-.25V6h-2.75A1.75 1.75 0 019 4.25V1.5H3.75zm6.75.062V4.25c0 .138.112.25.25.25h2.688a.252.252 0 00-.011-.013l-2.914-2.914a.272.272 0 00-.013-.011zM2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0113.25 16h-9.5A1.75 1.75 0 012 14.25V1.75z"></path>
+</svg>
+          </div>
+
+          <div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
+            <span class="css-truncate css-truncate-target d-block width-fit"><a class="js-navigation-open Link--primary" title="requirements.txt" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2/blob/master/requirements.txt">requirements.txt</a></span>
+          </div>
+
+          <div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
+              <div class="Skeleton Skeleton--text col-7">&nbsp;</div>
+          </div>
+
+          <div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
+              <div class="Skeleton Skeleton--text">&nbsp;</div>
+          </div>
+
+        </div>
+        <div role="row" class="Box-row Box-row--focus-gray py-2 d-flex position-relative js-navigation-item ">
+          <div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
+              <svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-fg-muted">
+    <path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 00.25-.25V6h-2.75A1.75 1.75 0 019 4.25V1.5H3.75zm6.75.062V4.25c0 .138.112.25.25.25h2.688a.252.252 0 00-.011-.013l-2.914-2.914a.272.272 0 00-.013-.011zM2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0113.25 16h-9.5A1.75 1.75 0 012 14.25V1.75z"></path>
+</svg>
+          </div>
+
+          <div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
+            <span class="css-truncate css-truncate-target d-block width-fit"><a class="js-navigation-open Link--primary" title="sample_ast.json" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2/blob/master/sample_ast.json">sample_ast.json</a></span>
+          </div>
+
+          <div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
+              <div class="Skeleton Skeleton--text col-7">&nbsp;</div>
+          </div>
+
+          <div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
+              <div class="Skeleton Skeleton--text">&nbsp;</div>
+          </div>
+
+        </div>
+        <div role="row" class="Box-row Box-row--focus-gray py-2 d-flex position-relative js-navigation-item ">
+          <div role="gridcell" class="mr-3 flex-shrink-0" style="width: 16px;">
+              <svg aria-label="File" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file color-fg-muted">
+    <path fill-rule="evenodd" d="M3.75 1.5a.25.25 0 00-.25.25v12.5c0 .138.112.25.25.25h9.5a.25.25 0 00.25-.25V6h-2.75A1.75 1.75 0 019 4.25V1.5H3.75zm6.75.062V4.25c0 .138.112.25.25.25h2.688a.252.252 0 00-.011-.013l-2.914-2.914a.272.272 0 00-.013-.011zM2 1.75C2 .784 2.784 0 3.75 0h6.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v9.586A1.75 1.75 0 0113.25 16h-9.5A1.75 1.75 0 012 14.25V1.75z"></path>
+</svg>
+          </div>
+
+          <div role="rowheader" class="flex-auto min-width-0 col-md-2 mr-3">
+            <span class="css-truncate css-truncate-target d-block width-fit"><a class="js-navigation-open Link--primary" title="test.aquery" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/sunyinqi0508/AQuery2/blob/master/test.aquery">test.aquery</a></span>
+          </div>
+
+          <div role="gridcell" class="flex-auto min-width-0 d-none d-md-block col-5 mr-3" >
+              <div class="Skeleton Skeleton--text col-7">&nbsp;</div>
+          </div>
+
+          <div role="gridcell" class="color-fg-muted text-right" style="width:100px;">
+              <div class="Skeleton Skeleton--text">&nbsp;</div>
+          </div>
+
+        </div>
+    </div>
+    <div class="Details-content--shown Box-footer d-md-none p-0">
+        <button aria-expanded="false" type="button" data-view-component="true" class="js-details-target btn-link d-block width-full px-3 py-2">    View code
+</button>    </div>
+  </div>
+
+</include-fragment>
+
+
+</div>
+
+  
+      <readme-toc>
+
+      <div id="readme" class="Box md js-code-block-container js-code-nav-container js-tagsearch-file Box--responsive"
+          data-tagsearch-path="README.md"
+          data-tagsearch-lang="Markdown">
+
+        <div class="d-flex  js-sticky js-position-sticky top-0 border-top-0 border-bottom p-2 flex-items-center flex-justify-between color-bg-default rounded-top-2"  style="position: sticky; z-index: 30;" >
+          <div class="d-flex flex-items-center">
+              <details
+  data-target="readme-toc.trigger"
+  data-menu-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;trigger&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}"
+  data-menu-hydro-click-hmac="caf6d1427019f234c16009fc8810d23190fbb27b9a68d48f9e3257a05274a541"
+  class="dropdown details-reset details-overlay"
+>
+  <summary
+    class="btn btn-octicon m-0 mr-2 p-2"
+    aria-haspopup="true"
+    aria-label="Table of Contents">
+    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-list-unordered">
+    <path fill-rule="evenodd" d="M2 4a1 1 0 100-2 1 1 0 000 2zm3.75-1.5a.75.75 0 000 1.5h8.5a.75.75 0 000-1.5h-8.5zm0 5a.75.75 0 000 1.5h8.5a.75.75 0 000-1.5h-8.5zm0 5a.75.75 0 000 1.5h8.5a.75.75 0 000-1.5h-8.5zM3 8a1 1 0 11-2 0 1 1 0 012 0zm-1 6a1 1 0 100-2 1 1 0 000 2z"></path>
+</svg>
+  </summary>
+
+
+  <details-menu class="SelectMenu" role="menu">
+    <div class="SelectMenu-modal rounded-3 mt-1" style="max-height:340px;">
+
+        <div class="SelectMenu-filter">
+          <input
+            class="SelectMenu-input form-control js-filterable-field"
+            id="toc-filter-field"
+            type="text"
+            autocomplete="off"
+            spellcheck="false"
+            autofocus
+            placeholder="Filter headings"
+            aria-label="Filter headings">
+        </div>
+
+      <div class="SelectMenu-list SelectMenu-list--borderless p-2" style="overscroll-behavior: contain;" data-filterable-for="toc-filter-field" data-filterable-type="substring">
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 text-emphasized" style="-webkit-box-orient: vertical; padding-left: 12px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#aquery-database">AQuery++ Database</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#introduction">Introduction</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#requirements">Requirements</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#installation">Installation</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#windows">Windows</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#macos">macOS</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#linux">Linux</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#docker">Docker:</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#usage">Usage</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 48px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#commands">Commands:</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#example">Example:</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#architecture">Architecture</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#aquery-compiler">AQuery Compiler</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#execution-engines">Execution Engines</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#roadmap">Roadmap</a>
+          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#known-issues">Known Issues:</a>
+      </div>
+    </div>
+  </details-menu>
+</details>
+
+            <h2 class="Box-title">
+              <a href="#readme" data-view-component="true" class="Link--primary">README.md</a>
+            </h2>
+          </div>
+        </div>
+
+          <div data-target="readme-toc.content" class="Box-body px-5 pb-5">
+            <article class="markdown-body entry-content container-lg" itemprop="text"><h1 dir="auto"><a id="user-content-aquery-database" class="anchor" aria-hidden="true" href="#aquery-database"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>AQuery++ Database</h1>
+<h2 dir="auto"><a id="user-content-introduction" class="anchor" aria-hidden="true" href="#introduction"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Introduction</h2>
+<p dir="auto">AQuery++ Database is a cross-platform, In-Memory Column-Store Database that incorporates compiled query execution.</p>
+<h2 dir="auto"><a id="user-content-requirements" class="anchor" aria-hidden="true" href="#requirements"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Requirements</h2>
+<ol dir="auto">
+<li>
+<p dir="auto">Recent version of Linux, Windows or MacOS, with recent C++ compiler that has C++17 (1z) support. (however c++20 is recommended if available for heterogeneous lookup on unordered containers)</p>
+<ul dir="auto">
+<li>GCC: 9.0 or above (g++ 7.x, 8.x fail to handle fold-expressions due to a compiler bug)</li>
+<li>Clang: 5.0 or above (Recommended)</li>
+<li>MSVC: 2019 or later (2022 or above is recommended)</li>
+</ul>
+</li>
+<li>
+<p dir="auto">Monetdb for Hybrid Engine</p>
+<ul dir="auto">
+<li>On windows, the required libraries and headers are already included in the repo.</li>
+<li>On Linux, see <a href="https://www.monetdb.org/easy-setup/" rel="nofollow">Monetdb Easy Setup</a> for instructions.</li>
+<li>On MacOS, Monetdb can be easily installed in homebrew <code>brew install monetdb</code>.</li>
+</ul>
+</li>
+<li>
+<p dir="auto">Python 3.6 or above and install required packages in requirements.txt by <code>python3 -m pip install -r requirements.txt</code></p>
+</li>
+</ol>
+<h2 dir="auto"><a id="user-content-installation" class="anchor" aria-hidden="true" href="#installation"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Installation</h2>
+<p dir="auto">AQuery is tested on mainstream operating systems such as Windows, macOS and Linux</p>
+<h3 dir="auto"><a id="user-content-windows" class="anchor" aria-hidden="true" href="#windows"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Windows</h3>
+<p dir="auto">There're multiple options to run AQuery on Windows. You can use the native toolchain from Microsoft Visual Studio or gcc from Cygwin/MinGW or run it under Windows Subsystem for Linux.</p>
+<ul dir="auto">
+<li>
+<p dir="auto">For WSL, Docker or Linux virtual machines, see Linux, Docker sections below</p>
+</li>
+<li>
+<p dir="auto">For Visual Studio:</p>
+<ol dir="auto">
+<li>Install python3.6 or above from <a href="https://www.python.org/downloads/windows/" rel="nofollow">official website</a> or Microsoft Store.</li>
+<li>Install Microsoft Visual Studio 2022 or later with <strong>Desktop development with C++</strong> selected.</li>
+<li>Clone AQuery repo from <a href="https://github.com/sunyinqi0508/AQuery2">Github</a></li>
+<li>Install python requirements with pip <code>python3 -m pip install -r requirements.txt</code></li>
+<li>Change the build driver from aquery_config.py to "MSBuild"</li>
+<li>The libraries and headers for Monetdb are already included in msc-plugins, however you can also choose to download them from <a href="https://www.monetdb.org/easy-setup/" rel="nofollow">Monetdb Easy Setup</a> and put them in the same place.</li>
+</ol>
+</li>
+<li>
+<p dir="auto">For MinGW:</p>
+<ol dir="auto">
+<li>Install gcc and python3 using the package manager. (For Msys2, <code>pacman -S gcc python3</code>)</li>
+<li>Clone AQuery repo from Github</li>
+<li>Install python requirements</li>
+<li>The prebuilt binaries are included in ./lib directory. However, you could also rebuild them from <a href="https://github.com/MonetDB/MonetDB">source</a>.</li>
+</ol>
+</li>
+<li>
+<p dir="auto">Note that it might be possible to use python from python.org or Microsoft store with gcc from MinGW. However, it might not work because of ABI breakage. So the better way is to use gcc with MinGW python from pacman or use clang/MSVC instead.</p>
+</li>
+</ul>
+<h3 dir="auto"><a id="user-content-macos" class="anchor" aria-hidden="true" href="#macos"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>macOS</h3>
+<ul dir="auto">
+<li>Install a package manager such as <a href="https://brew.sh" rel="nofollow">homebrew</a></li>
+<li>Install python3 and monetdb using homebrew <code>brew install python3 monetdb</code></li>
+<li>Install C++ compiler come with Xcode commandline tool by <code>xcode-select --install</code> or from homebrew</li>
+<li>If you have multiple C++ compilers on the system. Specify C++ compiler by setting the <strong>CXX</strong> environment variable. e.g. <code>export CXX=clang</code></li>
+<li>Install python packages from <strong>requirements.txt</strong></li>
+</ul>
+<p dir="auto"><strong>for arm64 macOS users</strong></p>
+<ul dir="auto">
+<li>In theory, AQuery++ could work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred.</li>
+<li>However, they can't be mixed up, i.e. make sure every component, <code>python</code> binary, <code>C++ compiler</code>, <code>monetdb</code> library and system commandline utilities such as <code>uname</code> should have the same architecture.</li>
+<li>Because I can't get access to an arm-based mac to fully test this setup, there might still be issues. Please open an issue if you encounter any problems.</li>
+</ul>
+<h3 dir="auto"><a id="user-content-linux" class="anchor" aria-hidden="true" href="#linux"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Linux</h3>
+<ul dir="auto">
+<li>Install monetdb, see <a href="https://www.monetdb.org/easy-setup/" rel="nofollow">Monetdb Easy Setup</a> for instructions.</li>
+<li>Install python3, C++ compiler and git. (For Ubuntu, run <code>apt update &amp;&amp; apt install -y python3 python3-pip clang-14 libmonetdbe-dev git </code>)</li>
+<li>Install required python packages by <code>python3 -m pip install -r requirements.txt</code></li>
+<li>If you have multiple C++ compilers on the system. Specify C++ compiler by setting the <strong>CXX</strong> environment variable. e.g. <code>export CXX=clang++-14</code></li>
+</ul>
+<h3 dir="auto"><a id="user-content-docker" class="anchor" aria-hidden="true" href="#docker"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Docker:</h3>
+<ul dir="auto">
+<li>Alternatively, you can also use docker to run AQuery.</li>
+<li>Type <code>make docker</code> to build the docker image from scratch.</li>
+<li>For Arm-based Mac users, you would need to build and run the x86_64 docker image because MonetDB doesn't offer official binaries for arm64 Linux.</li>
+</ul>
+<h2 dir="auto"><a id="user-content-usage" class="anchor" aria-hidden="true" href="#usage"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Usage</h2>
+<p dir="auto"><code>python3 prompt.py</code> will launch the interactive command prompt. The server binary will be automatically rebuilt and started.</p>
+<h4 dir="auto"><a id="user-content-commands" class="anchor" aria-hidden="true" href="#commands"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Commands:</h4>
+<ul dir="auto">
+<li>
+<p dir="auto"><code>&lt;sql statement&gt;</code>: parse AQuery statement</p>
+</li>
+<li>
+<p dir="auto"><code>f &lt;filename&gt;</code>: parse all AQuery statements in file</p>
+</li>
+<li>
+<p dir="auto"><code>dbg</code> start debugging session</p>
+</li>
+<li>
+<p dir="auto"><code>print</code>: printout parsed AQuery statements</p>
+</li>
+<li>
+<p dir="auto"><code>xexec</code>: execute last parsed statement(s) with Hybrid Execution Engine. Hybrid Execution Engine decouples the query into two parts. The standard SQL (MonetDB dialect) part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.</p>
+</li>
+<li>
+<p dir="auto"><code>save &lt;OPTIONAL: filename&gt;</code>: save current code snippet. will use random filename if not specified.</p>
+</li>
+<li>
+<p dir="auto"><code>exit</code>: quit the prompt</p>
+</li>
+<li>
+<p dir="auto"><code>r</code>: run the last generated code snippet</p>
+</li>
+</ul>
+<h3 dir="auto"><a id="user-content-example" class="anchor" aria-hidden="true" href="#example"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Example:</h3>
+<p dir="auto"><code>f moving_avg.a</code> <br>
+<code>xexec</code></p>
+<p dir="auto">See ./tests/ for more examples.</p>
+<h2 dir="auto"><a id="user-content-architecture" class="anchor" aria-hidden="true" href="#architecture"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Architecture</h2>
+<p dir="auto"><a target="_blank" rel="noopener noreferrer" href="/sunyinqi0508/AQuery2/blob/master/docs/arch-hybrid.svg"><img src="/sunyinqi0508/AQuery2/raw/master/docs/arch-hybrid.svg" alt="Architecture" style="max-width: 100%;"></a></p>
+<h3 dir="auto"><a id="user-content-aquery-compiler" class="anchor" aria-hidden="true" href="#aquery-compiler"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>AQuery Compiler</h3>
+<ul dir="auto">
+<li>The query is first processed by the AQuery Compiler which is composed of a frontend that parses the query into AST and a backend that generates target code that delivers the query.</li>
+<li>Front end of AQuery++ Compiler is built on top of <a href="https://github.com/klahnakoski/mo-sql-parsing">mo-sql-parsing</a> with modifications to handle AQuery dialect and extension.</li>
+<li>Backend of AQuery++ Compiler generates target code dependent on the Execution Engine. It can either be the C++ code for AQuery Execution Engine or sql and C++ post-processor for Hybrid Engine or k9 for the k9 Engine.</li>
+</ul>
+<h3 dir="auto"><a id="user-content-execution-engines" class="anchor" aria-hidden="true" href="#execution-engines"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Execution Engines</h3>
+<ul dir="auto">
+<li>AQuery++ supports different execution engines thanks to the decoupled compiler structure.</li>
+<li>AQuery Execution Engine: executes queries by compiling the query plan to C++ code. Doesn't support joins and udf functions.</li>
+<li>Hybrid Execution Engine: decouples the query into two parts. The sql-compliant part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.</li>
+<li>K9 Execution Engine: (discontinued).</li>
+</ul>
+<h2 dir="auto"><a id="user-content-roadmap" class="anchor" aria-hidden="true" href="#roadmap"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Roadmap</h2>
+<ul class="contains-task-list">
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> SQL Parser -&gt; AQuery Parser (Front End)</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> AQuery-C++ Compiler (Back End)
+<ul class="contains-task-list">
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Schema and Data Model</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Data acquisition/output from/to csv file</li>
+</ul>
+</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Execution Engine
+<ul class="contains-task-list">
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Projections and single-group Aggregations</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Group by Aggregations</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Filters</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Order by</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Assumption</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Flatten</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> UDFs (Hybrid Engine only)</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> User Module</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Triggers</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Join (Hybrid Engine only)</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Subqueries</li>
+</ul>
+</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Query Optimization
+<ul class="contains-task-list">
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Selection/Order by push-down</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Join Optimization (Only in Hybrid Engine)</li>
+</ul>
+</li>
+</ul>
+<h2 dir="auto"><a id="user-content-known-issues" class="anchor" aria-hidden="true" href="#known-issues"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Known Issues:</h2>
+<ul class="contains-task-list">
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Interval based triggers</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Hot reloading server binary</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Bug fixes: type deduction misaligned in Hybrid Engine</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Investigation: Using postproc only for q1 in Hybrid Engine (make is_special always on)</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> C++ Meta-Programming: Eliminate template recursions as much as possible.</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Functionality: Basic helper functions in aquery</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Improvement: More DDLs, e.g. drop table, update table, etc.</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Bug: Join-Aware Column management</li>
+<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Bug: Order By after Group By</li>
+</ul>
+</article>
+          </div>
+      </div>
+
+  </readme-toc>
+
+
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+        <div class="BorderGrid-row hide-sm hide-md">
+          <div class="BorderGrid-cell">
+            <h2 class="mb-3 h4">About</h2>
+
+    <p class="f4 my-3">
+      An in-memory column-store time-series database that uses query compilation
+    </p>
+
+  <h3 class="sr-only">Topics</h3>
+  <div class="my-3">
+      <div class="f6">
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+  python
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+  database
+</a>
+      <a data-ga-click="Topic, repository page" data-octo-click="topic_click" data-octo-dimensions="topic:time-series" href="/topics/time-series" title="Topic: time-series" data-view-component="true" class="topic-tag topic-tag-link">
+  time-series
+</a>
+      <a data-ga-click="Topic, repository page" data-octo-click="topic_click" data-octo-dimensions="topic:olap" href="/topics/olap" title="Topic: olap" data-view-component="true" class="topic-tag topic-tag-link">
+  olap
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diff --git a/README.md b/README.md
index f1e0cb1..df2e038 100644
--- a/README.md
+++ b/README.md
@@ -28,21 +28,23 @@ There're multiple options to run AQuery on Windows. You can use the native toolc
   2. Install Microsoft Visual Studio 2022 or later with **Desktop development with C++** selected.
   3. Clone AQuery repo from [Github](https://github.com/sunyinqi0508/AQuery2)
   4. Install python requirements with pip `python3 -m pip install -r requirements.txt`
-  5. Change the build driver from aquery_config.py to "MSBuild"
+  5. Change the build_driver variable in aquery_config.py to "MSBuild"
   6. The libraries and headers for Monetdb are already included in msc-plugins, however you can also choose to download them from [Monetdb Easy Setup](https://www.monetdb.org/easy-setup/) and put them in the same place.
 
 - For Winlibs (Recommended):
   - Download latest winlibs toolchain from the [official website](https://winlibs.com/)
   - Since winlibs is linked with native windows runtime libraries (UCRT or MSVCRT), it offers better interoperatibility with other libraries built with MSVC such as python and monetdb.
   - Other steps can be either the same as Visual Studio or Cygwin/Mingw (below) without ABI break.
+  - Copy or link `mingw64/libexec/gcc/<arch>/<version>/liblto-plugin.dll` to `mingw64/lib/bfd-plugins/` For Link time optimization support on gcc-ar and gcc-ranlib 
   
 - For CygWin/MinGW:
-   1. Install gcc and python3 using its **builtin package manager** instead of the one from python.org or windows store. (For Msys2, `pacman -S gcc python3`)
+   1. Install gcc and python3 using its **builtin package manager** instead of the one from python.org or windows store. (For Msys2, `pacman -S gcc python3`). Otherwise, ABI breakage may happen.
    2. Clone AQuery repo from Github
    3. Install python requirements
    4. The prebuilt binaries are included in ./lib directory. However, you could also rebuild them from [source](https://github.com/MonetDB/MonetDB).
    
 ### macOS
+- If you're using an arm-based mac (e.g. M1, M2 processors). Please go to the Application folder and right-click on the Terminal app, select 'Get Info' and ensure that the 'Open using Rosetta' option is unchecked. See the section below for more notes for arm-based macs.
 - Install a package manager such as [homebrew](https://brew.sh) 
 - Install python3 and monetdb using homebrew `brew install python3 monetdb`
 - Install C++ compiler come with Xcode commandline tool by `xcode-select --install` or from homebrew
@@ -50,8 +52,10 @@ There're multiple options to run AQuery on Windows. You can use the native toolc
 - Install python packages from **requirements.txt**
   
 **for arm64 macOS users**
-- In theory, AQuery++ could work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred. 
-- However, they can't be mixed up, i.e. make sure every component, `python` binary, `C++ compiler`, `monetdb` library and system commandline utilities such as `uname` should have the same architecture. 
+- In theory, AQuery++ can work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred. 
+- However, they can't be mixed up, i.e. make sure every component, `python` , `C++ compiler`, `monetdb` library and system commandline utilities such as `uname` should have the same architecture. 
+- Use the script `./arch-check.sh` to check if relevant binaries all have the same architecture.
+- In the case where binaries have different architectures, install the software with desired architecture and make an alias or link to ensure the newly installed binary is referred to. 
 - Because I can't get access to an arm-based mac to fully test this setup, there might still be issues. Please open an issue if you encounter any problems.
   
 ### Linux
@@ -59,19 +63,23 @@ There're multiple options to run AQuery on Windows. You can use the native toolc
 - Install python3, C++ compiler and git. (For Ubuntu, run `apt update && apt install -y python3 python3-pip clang-14 libmonetdbe-dev git `)
 - Install required python packages by `python3 -m pip install -r requirements.txt`
 - If you have multiple C++ compilers on the system. Specify C++ compiler by setting the **CXX** environment variable. e.g. `export CXX=clang++-14`
+- Note for anaconda users: the system libraries included in anaconda might differ from the ones your compiler is using. In this case, you might get errors similar to: 
+  >ImportError: libstdc++.so.6: version `GLIBCXX_3.4.26' not found 
+   
+   In this case, upgrade anaconda or your compiler or use the python from your OS or package manager instead. Or (**NOT recommended**) copy/link the library from your system (e.g. /usr/lib/x86_64-linux-gnu/libstdc++.so.6) to anaconda's library directory (e.g. ~/Anaconda3/lib/).
+
 ### Docker: 
    - Alternatively, you can also use docker to run AQuery.
    - Type `make docker` to build the docker image from scratch. 
-   - For Arm-based Mac users, you would need to build and run the x86_64 docker image because MonetDB doesn't offer official binaries for arm64 Linux. 
+   - For Arm-based Mac users, you would have to build and run the x86_64 docker image because MonetDB doesn't offer official binaries for arm64 Linux. 
 ## Usage
 `python3 prompt.py` will launch the interactive command prompt. The server binary will be automatically rebuilt and started.
 #### Commands:
 - `<sql statement>`: parse AQuery statement
 - `f <filename>`: parse all AQuery statements in file
+- `exec`: execute last parsed statement(s) with Hybrid Execution Engine. Hybrid Execution Engine decouples the query into two parts. The standard SQL (MonetDB dialect) part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.
 - `dbg` start debugging session 
 - `print`: printout parsed AQuery statements
-
-- `xexec`: execute last parsed statement(s) with Hybrid Execution Engine. Hybrid Execution Engine decouples the query into two parts. The standard SQL (MonetDB dialect) part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.
 - `save <OPTIONAL: filename>`: save current code snippet. will use random filename if not specified.
 - `exit`: quit the prompt
 - `r`: run the last generated code snippet
diff --git a/aquery_config.py b/aquery_config.py
index 699ad70..c2ede14 100644
--- a/aquery_config.py
+++ b/aquery_config.py
@@ -2,7 +2,7 @@
 
 ## GLOBAL CONFIGURATION FLAGS
 
-version_string = '0.4.6a'
+version_string = '0.4.7a'
 add_path_to_ldpath = True
 rebuild_backend = False
 run_backend = True
diff --git a/arch-check.sh b/arch-check.sh
new file mode 100644
index 0000000..a472028
--- /dev/null
+++ b/arch-check.sh
@@ -0,0 +1,21 @@
+ARCH=`uname -m`
+ARCH2=`arch`
+echo Current architechure: $ARCH $ARCH2
+echo Current shell: $SHELL
+PASSED=1
+for i in python3 c++ make ranlib libtool $SHELL
+do
+	FILEPATH=`which $i`
+	FILEINFO=`file $FILEPATH`
+	if [[ $FILEINFO =~ $ARCH ]]; then
+		echo $i@$FILEPATH: passed
+	else
+		echo "\033[1;31mERROR\033[0m: Architecture of $i is not $ARCH: $FILEINFO"
+		PASSED=0
+	fi
+done
+
+if [[ PASSED -eq 1 ]]; then
+	echo "\033[1;32mBinary archtechure check passed\033[0m"
+fi
+
diff --git a/build.py b/build.py
index edf09be..172b30c 100644
--- a/build.py
+++ b/build.py
@@ -94,8 +94,8 @@ class build_manager:
             ret = True
             for c in self.build_cmd:
                 if c:
-                    try:
-                        ret = subprocess.call(c, stdout = stdout, stderr = stderr) and ret
+                    try: # only last success matters
+                        ret = not subprocess.call(c, stdout = stdout, stderr = stderr) # and ret
                     except (FileNotFoundError):
                         ret = False
                         pass
@@ -205,21 +205,23 @@ class build_manager:
              self.cache_status.sources or 
              self.cache_status.env
         ):
-            self.driver.pch()
-            self.driver.libaquery_a()
-            self.driver.server()
+            success &= self.driver.pch()
+            success &= self.driver.libaquery_a()
+            success &= self.driver.server()
         else:
             if self.cache_status.libaquery_a:
-                success = self.driver.libaquery_a() and success
+                success &= self.driver.libaquery_a() 
             if self.cache_status.pch_hpp_gch:
-                success = self.driver.pch() and success
+                success &= self.driver.pch() 
             if self.cache_status.server:
-                success = self.driver.server() and success
+                success &= self.driver.server() 
         if success:
             current.calc(self.cxx, libaquery_a)
             with open('.cached', 'wb') as cache_sig:
                 cache_sig.write(pickle.dumps(current))
         else:
+            if aquery_config.os_platform == 'mac':
+                os.system('./arch-check.sh')
             try:
                 os.remove('./.cached')
             except:
diff --git a/engine/utils.py b/engine/utils.py
index 995d354..065f8c8 100644
--- a/engine/utils.py
+++ b/engine/utils.py
@@ -140,4 +140,7 @@ nullstream = open(os.devnull, 'w')
 
 
 def clamp(val, minval, maxval):
-    return min(max(val, minval), maxval)
\ No newline at end of file
+    return min(max(val, minval), maxval)
+
+def escape_qoutes(string : str):
+    return re.sub(r'^\'', r'\'',re.sub(r'([^\\])\'', r'\1\'', string))
diff --git a/prompt.py b/prompt.py
index 91fbbe2..3598c62 100644
--- a/prompt.py
+++ b/prompt.py
@@ -43,7 +43,7 @@ dbg:
 print: 
     printout parsed sql statements
 exec: 
-    execute last parsed statement(s) with AQuery Execution Engine
+    execute last parsed statement(s) with AQuery Execution Engine (disabled)
 xexec: 
     execute last parsed statement(s) with Hybrid Execution Engine
 r: 
@@ -336,7 +336,7 @@ def prompt(running = lambda:True, next = lambda:input('> '), state = None):
                 time.sleep(.00001)
             og_q : str = next()
             q = og_q.lower().strip()
-            if q == 'exec': # generate build and run (AQuery Engine)
+            if False and q == 'exec': # generate build and run (AQuery Engine)
                 state.cfg.backend_type = Backend_Type.BACKEND_AQuery.value
                 cxt = engine.exec(state.stmts, cxt, keep)
                 if state.buildmgr.build_dll() == 0:
@@ -352,7 +352,7 @@ def prompt(running = lambda:True, next = lambda:input('> '), state = None):
                 else:
                     print(prompt_help)
                 continue
-            elif q.startswith('xexec'): # generate build and run (MonetDB Engine)
+            elif q.startswith('xexec') or q.startswith('exec'): # generate build and run (MonetDB Engine)
                 state.cfg.backend_type = Backend_Type.BACKEND_MonetDB.value
                 cxt = xengine.exec(state.stmts, cxt, keep)
                 
diff --git a/reconstruct/ast.py b/reconstruct/ast.py
index 52dc8ef..44fb969 100644
--- a/reconstruct/ast.py
+++ b/reconstruct/ast.py
@@ -617,6 +617,7 @@ class join(ast_node):
         self.join_conditions = []
         # self.tmp_name = 'join_' + base62uuid(4)
         # self.datasource = TableInfo(self.tmp_name, [], self.context)
+        
     def append(self, tbls, __alias = ''):
         alias = lambda t : t + ' ' + __alias if len(__alias) else t
         if type(tbls) is join:
@@ -661,8 +662,11 @@ class join(ast_node):
                     self.have_sep = True
                     j = join(self, node[keys[0]])
                     tablename = f' {keys[0]} {j}'
-                    if len(keys) > 1 and keys[1].lower() == 'on':
-                        tablename += f' on {expr(self, node[keys[1]])}' 
+                    if len(keys) > 1 :
+                        if keys[1].lower() == 'on':
+                            tablename += f' ON {expr(self, node[keys[1]])}' 
+                        elif keys[1].lower() == 'using':
+                            tablename += f' USING {expr(self, node[keys[1]])}'
                     self.joins.append((tablename, self.have_sep))
                     self.tables += j.tables
                     self.tables_dir = {**self.tables_dir, **j.tables_dir}
@@ -731,8 +735,9 @@ class join(ast_node):
 class filter(ast_node):
     name = 'where'
     def produce(self, node):
-        self.add(expr(self, node).sql)
-    
+        filter_expr = expr(self, node)
+        self.add(filter_expr.sql)
+        self.datasource.join_conditions += filter_expr.join_conditions
         
 class create_table(ast_node):
     name = 'create_table'
diff --git a/reconstruct/expr.py b/reconstruct/expr.py
index e5980d4..0faf9a5 100644
--- a/reconstruct/expr.py
+++ b/reconstruct/expr.py
@@ -12,6 +12,11 @@ from engine.types import *
 
 class expr(ast_node):
     name='expr'
+    valid_joincond = {
+        0 : ('and', 'eq', 'not'),
+        1 : ('or', 'neq', 'not'),
+        2 : ('', '', '')
+    }
     @property
     def udf_decltypecall(self):
         return self._udf_decltypecall if self._udf_decltypecall else self.sql
@@ -46,6 +51,7 @@ class expr(ast_node):
         self.node = node
         self.supress_undefined = supress_undefined
         if(type(parent) is expr):
+            self.next_valid = parent.next_valid
             self.inside_agg = parent.inside_agg
             self.is_udfexpr = parent.is_udfexpr
             self.is_agg_func = parent.is_agg_func
@@ -53,6 +59,8 @@ class expr(ast_node):
             self.c_code = parent.c_code
             self.builtin_vars = parent.builtin_vars
         else:
+            self.join_conditions = []
+            self.next_valid = 0
             self.is_agg_func = False
             self.is_udfexpr = type(parent) is udf
             self.root : expr = self
@@ -92,9 +100,18 @@ class expr(ast_node):
             else:
                 if len(node) > 1:
                     print(f'Parser Error: {node} has more than 1 dict entry.')
-                
+
+                is_joincond = False
                 for key, val in node.items():
                     key = key.lower()
+                    if key not in self.valid_joincond[self.next_valid]:
+                        self.next_valid = 2
+                    else:
+                        if key == self.valid_joincond[self.next_valid][2]:
+                            self.next_valid = not self.next_valid
+                        elif key == self.valid_joincond[self.next_valid][1]:
+                            self.next_valid = 2
+                            is_joincond = True
                     if key in self.operators:
                         if key in builtin_func:
                             if self.is_agg_func:
@@ -200,6 +217,9 @@ class expr(ast_node):
                     else:
                         print(f'Undefined expr: {key}{val}')
                 
+                if (is_joincond and len(self.children) == 2
+                    and all([c.is_ColExpr for c in self.children])) :
+                    self.root.join_conditions.append((c.raw_col for c in self.children))
                     
         if type(node) is str:
             if self.is_udfexpr:
@@ -342,9 +362,11 @@ class expr(ast_node):
                             exec(f'loc["{b}"] = lambda : "{b}"')
                     
             x = self.c_code if c_code is None else c_code
+            from engine.utils import escape_qoutes
             if decltypestr:
-                return eval('f\'' + self.udf_decltypecall + '\'')
-            return eval('f\'' + self.sql + '\'')
+                return eval('f\'' + escape_qoutes(self.udf_decltypecall) + '\'')
+            self.sql.replace("'", "\\'")
+            return eval('f\'' + escape_qoutes(self.sql) + '\'')
         if self.is_recursive_call_inudf or (self.need_decltypestr and self.is_udfexpr) or gettype:
             return call
         else:
diff --git a/test.aquery b/test.aquery
index 624e03b..7756ff4 100644
--- a/test.aquery
+++ b/test.aquery
@@ -1,5 +1,8 @@
 #!aquery
 
+select "hello world"
+xexec
+
 echo Testing Insert, Filters and Nested Aggregation
 f stock.a
 xexec

From 15f11f1eab25e950ccafc3d6b762a05aa7a02cc9 Mon Sep 17 00:00:00 2001
From: Bill <sunyinqi0508@gmail.com>
Date: Tue, 27 Sep 2022 05:25:25 +0800
Subject: [PATCH 12/12] Updated instructions, bulid drivers, bug fixes

---
 AQuery2                         | 2616 -------------------------------
 MonetDB-release-epel.noarch.rpm |  Bin 6588 -> 0 bytes
 2 files changed, 2616 deletions(-)
 delete mode 100644 AQuery2
 delete mode 100644 MonetDB-release-epel.noarch.rpm

diff --git a/AQuery2 b/AQuery2
deleted file mode 100644
index 4478769..0000000
--- a/AQuery2
+++ /dev/null
@@ -1,2616 +0,0 @@
-
-
-
-
-
-
-
-<!DOCTYPE html>
-<html lang="en" data-color-mode="auto" data-light-theme="light" data-dark-theme="dark" data-a11y-animated-images="system">
-  <head>
-    <meta charset="utf-8">
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-  <link rel="dns-prefetch" href="https://avatars.githubusercontent.com">
-  <link rel="dns-prefetch" href="https://github-cloud.s3.amazonaws.com">
-  <link rel="dns-prefetch" href="https://user-images.githubusercontent.com/">
-  <link rel="preconnect" href="https://github.githubassets.com" crossorigin>
-  <link rel="preconnect" href="https://avatars.githubusercontent.com">
-
-
-
-  <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/light-5178aee0ee76.css" /><link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/dark-217d4f9c8e70.css" /><link data-color-theme="dark_dimmed" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_dimmed-0adfa28f0e68.css" /><link data-color-theme="dark_high_contrast" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_high_contrast-1c8575b36644.css" /><link data-color-theme="dark_colorblind" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_colorblind-5113d2be20b0.css" /><link data-color-theme="light_colorblind" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/light_colorblind-c96add742484.css" /><link data-color-theme="light_high_contrast" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/light_high_contrast-290f92f5e867.css" /><link data-color-theme="light_tritanopia" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/light_tritanopia-cdd88f146bf7.css" /><link data-color-theme="dark_tritanopia" crossorigin="anonymous" media="all" rel="stylesheet" data-href="https://github.githubassets.com/assets/dark_tritanopia-2171ea0f078b.css" />
-  
-    <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/primer-0e158a2f5ddd.css" />
-    <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/global-bec0587a3deb.css" />
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-
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-              data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;site header menu&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;SIGN_UP&quot;,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="e4b5fe731a6690114cd1e057638b5e0325e032e42f7ee46497d02253ca555a8f"
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-    class="application-main "
-    data-commit-hovercards-enabled
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-  >
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-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 text-emphasized" style="-webkit-box-orient: vertical; padding-left: 12px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#aquery-database">AQuery++ Database</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#introduction">Introduction</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#requirements">Requirements</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#installation">Installation</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#windows">Windows</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#macos">macOS</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#linux">Linux</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#docker">Docker:</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#usage">Usage</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 48px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#commands">Commands:</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#example">Example:</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#architecture">Architecture</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#aquery-compiler">AQuery Compiler</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 36px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#execution-engines">Execution Engines</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#roadmap">Roadmap</a>
-          <a role="menuitem" class="filter-item SelectMenu-item ws-normal wb-break-word line-clamp-2 py-1 " style="-webkit-box-orient: vertical; padding-left: 24px;" data-action="click:readme-toc#blur" data-targets="readme-toc.entries" data-hydro-click="{&quot;event_type&quot;:&quot;repository_toc_menu.click&quot;,&quot;payload&quot;:{&quot;target&quot;:&quot;entry&quot;,&quot;repository_id&quot;:484854813,&quot;originating_url&quot;:&quot;https://github.com/sunyinqi0508/AQuery2&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="a19c91dc1e47261718ab04ad7737db8e20e9ad3c698d76bd77d6e26f44d22757" href="#known-issues">Known Issues:</a>
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-            <article class="markdown-body entry-content container-lg" itemprop="text"><h1 dir="auto"><a id="user-content-aquery-database" class="anchor" aria-hidden="true" href="#aquery-database"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>AQuery++ Database</h1>
-<h2 dir="auto"><a id="user-content-introduction" class="anchor" aria-hidden="true" href="#introduction"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Introduction</h2>
-<p dir="auto">AQuery++ Database is a cross-platform, In-Memory Column-Store Database that incorporates compiled query execution.</p>
-<h2 dir="auto"><a id="user-content-requirements" class="anchor" aria-hidden="true" href="#requirements"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Requirements</h2>
-<ol dir="auto">
-<li>
-<p dir="auto">Recent version of Linux, Windows or MacOS, with recent C++ compiler that has C++17 (1z) support. (however c++20 is recommended if available for heterogeneous lookup on unordered containers)</p>
-<ul dir="auto">
-<li>GCC: 9.0 or above (g++ 7.x, 8.x fail to handle fold-expressions due to a compiler bug)</li>
-<li>Clang: 5.0 or above (Recommended)</li>
-<li>MSVC: 2019 or later (2022 or above is recommended)</li>
-</ul>
-</li>
-<li>
-<p dir="auto">Monetdb for Hybrid Engine</p>
-<ul dir="auto">
-<li>On windows, the required libraries and headers are already included in the repo.</li>
-<li>On Linux, see <a href="https://www.monetdb.org/easy-setup/" rel="nofollow">Monetdb Easy Setup</a> for instructions.</li>
-<li>On MacOS, Monetdb can be easily installed in homebrew <code>brew install monetdb</code>.</li>
-</ul>
-</li>
-<li>
-<p dir="auto">Python 3.6 or above and install required packages in requirements.txt by <code>python3 -m pip install -r requirements.txt</code></p>
-</li>
-</ol>
-<h2 dir="auto"><a id="user-content-installation" class="anchor" aria-hidden="true" href="#installation"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Installation</h2>
-<p dir="auto">AQuery is tested on mainstream operating systems such as Windows, macOS and Linux</p>
-<h3 dir="auto"><a id="user-content-windows" class="anchor" aria-hidden="true" href="#windows"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Windows</h3>
-<p dir="auto">There're multiple options to run AQuery on Windows. You can use the native toolchain from Microsoft Visual Studio or gcc from Cygwin/MinGW or run it under Windows Subsystem for Linux.</p>
-<ul dir="auto">
-<li>
-<p dir="auto">For WSL, Docker or Linux virtual machines, see Linux, Docker sections below</p>
-</li>
-<li>
-<p dir="auto">For Visual Studio:</p>
-<ol dir="auto">
-<li>Install python3.6 or above from <a href="https://www.python.org/downloads/windows/" rel="nofollow">official website</a> or Microsoft Store.</li>
-<li>Install Microsoft Visual Studio 2022 or later with <strong>Desktop development with C++</strong> selected.</li>
-<li>Clone AQuery repo from <a href="https://github.com/sunyinqi0508/AQuery2">Github</a></li>
-<li>Install python requirements with pip <code>python3 -m pip install -r requirements.txt</code></li>
-<li>Change the build driver from aquery_config.py to "MSBuild"</li>
-<li>The libraries and headers for Monetdb are already included in msc-plugins, however you can also choose to download them from <a href="https://www.monetdb.org/easy-setup/" rel="nofollow">Monetdb Easy Setup</a> and put them in the same place.</li>
-</ol>
-</li>
-<li>
-<p dir="auto">For MinGW:</p>
-<ol dir="auto">
-<li>Install gcc and python3 using the package manager. (For Msys2, <code>pacman -S gcc python3</code>)</li>
-<li>Clone AQuery repo from Github</li>
-<li>Install python requirements</li>
-<li>The prebuilt binaries are included in ./lib directory. However, you could also rebuild them from <a href="https://github.com/MonetDB/MonetDB">source</a>.</li>
-</ol>
-</li>
-<li>
-<p dir="auto">Note that it might be possible to use python from python.org or Microsoft store with gcc from MinGW. However, it might not work because of ABI breakage. So the better way is to use gcc with MinGW python from pacman or use clang/MSVC instead.</p>
-</li>
-</ul>
-<h3 dir="auto"><a id="user-content-macos" class="anchor" aria-hidden="true" href="#macos"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>macOS</h3>
-<ul dir="auto">
-<li>Install a package manager such as <a href="https://brew.sh" rel="nofollow">homebrew</a></li>
-<li>Install python3 and monetdb using homebrew <code>brew install python3 monetdb</code></li>
-<li>Install C++ compiler come with Xcode commandline tool by <code>xcode-select --install</code> or from homebrew</li>
-<li>If you have multiple C++ compilers on the system. Specify C++ compiler by setting the <strong>CXX</strong> environment variable. e.g. <code>export CXX=clang</code></li>
-<li>Install python packages from <strong>requirements.txt</strong></li>
-</ul>
-<p dir="auto"><strong>for arm64 macOS users</strong></p>
-<ul dir="auto">
-<li>In theory, AQuery++ could work on both native arm64 and x86_64 through Rosetta. But for maximum performance, running native is preferred.</li>
-<li>However, they can't be mixed up, i.e. make sure every component, <code>python</code> binary, <code>C++ compiler</code>, <code>monetdb</code> library and system commandline utilities such as <code>uname</code> should have the same architecture.</li>
-<li>Because I can't get access to an arm-based mac to fully test this setup, there might still be issues. Please open an issue if you encounter any problems.</li>
-</ul>
-<h3 dir="auto"><a id="user-content-linux" class="anchor" aria-hidden="true" href="#linux"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Linux</h3>
-<ul dir="auto">
-<li>Install monetdb, see <a href="https://www.monetdb.org/easy-setup/" rel="nofollow">Monetdb Easy Setup</a> for instructions.</li>
-<li>Install python3, C++ compiler and git. (For Ubuntu, run <code>apt update &amp;&amp; apt install -y python3 python3-pip clang-14 libmonetdbe-dev git </code>)</li>
-<li>Install required python packages by <code>python3 -m pip install -r requirements.txt</code></li>
-<li>If you have multiple C++ compilers on the system. Specify C++ compiler by setting the <strong>CXX</strong> environment variable. e.g. <code>export CXX=clang++-14</code></li>
-</ul>
-<h3 dir="auto"><a id="user-content-docker" class="anchor" aria-hidden="true" href="#docker"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Docker:</h3>
-<ul dir="auto">
-<li>Alternatively, you can also use docker to run AQuery.</li>
-<li>Type <code>make docker</code> to build the docker image from scratch.</li>
-<li>For Arm-based Mac users, you would need to build and run the x86_64 docker image because MonetDB doesn't offer official binaries for arm64 Linux.</li>
-</ul>
-<h2 dir="auto"><a id="user-content-usage" class="anchor" aria-hidden="true" href="#usage"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Usage</h2>
-<p dir="auto"><code>python3 prompt.py</code> will launch the interactive command prompt. The server binary will be automatically rebuilt and started.</p>
-<h4 dir="auto"><a id="user-content-commands" class="anchor" aria-hidden="true" href="#commands"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Commands:</h4>
-<ul dir="auto">
-<li>
-<p dir="auto"><code>&lt;sql statement&gt;</code>: parse AQuery statement</p>
-</li>
-<li>
-<p dir="auto"><code>f &lt;filename&gt;</code>: parse all AQuery statements in file</p>
-</li>
-<li>
-<p dir="auto"><code>dbg</code> start debugging session</p>
-</li>
-<li>
-<p dir="auto"><code>print</code>: printout parsed AQuery statements</p>
-</li>
-<li>
-<p dir="auto"><code>xexec</code>: execute last parsed statement(s) with Hybrid Execution Engine. Hybrid Execution Engine decouples the query into two parts. The standard SQL (MonetDB dialect) part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.</p>
-</li>
-<li>
-<p dir="auto"><code>save &lt;OPTIONAL: filename&gt;</code>: save current code snippet. will use random filename if not specified.</p>
-</li>
-<li>
-<p dir="auto"><code>exit</code>: quit the prompt</p>
-</li>
-<li>
-<p dir="auto"><code>r</code>: run the last generated code snippet</p>
-</li>
-</ul>
-<h3 dir="auto"><a id="user-content-example" class="anchor" aria-hidden="true" href="#example"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Example:</h3>
-<p dir="auto"><code>f moving_avg.a</code> <br>
-<code>xexec</code></p>
-<p dir="auto">See ./tests/ for more examples.</p>
-<h2 dir="auto"><a id="user-content-architecture" class="anchor" aria-hidden="true" href="#architecture"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Architecture</h2>
-<p dir="auto"><a target="_blank" rel="noopener noreferrer" href="/sunyinqi0508/AQuery2/blob/master/docs/arch-hybrid.svg"><img src="/sunyinqi0508/AQuery2/raw/master/docs/arch-hybrid.svg" alt="Architecture" style="max-width: 100%;"></a></p>
-<h3 dir="auto"><a id="user-content-aquery-compiler" class="anchor" aria-hidden="true" href="#aquery-compiler"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>AQuery Compiler</h3>
-<ul dir="auto">
-<li>The query is first processed by the AQuery Compiler which is composed of a frontend that parses the query into AST and a backend that generates target code that delivers the query.</li>
-<li>Front end of AQuery++ Compiler is built on top of <a href="https://github.com/klahnakoski/mo-sql-parsing">mo-sql-parsing</a> with modifications to handle AQuery dialect and extension.</li>
-<li>Backend of AQuery++ Compiler generates target code dependent on the Execution Engine. It can either be the C++ code for AQuery Execution Engine or sql and C++ post-processor for Hybrid Engine or k9 for the k9 Engine.</li>
-</ul>
-<h3 dir="auto"><a id="user-content-execution-engines" class="anchor" aria-hidden="true" href="#execution-engines"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Execution Engines</h3>
-<ul dir="auto">
-<li>AQuery++ supports different execution engines thanks to the decoupled compiler structure.</li>
-<li>AQuery Execution Engine: executes queries by compiling the query plan to C++ code. Doesn't support joins and udf functions.</li>
-<li>Hybrid Execution Engine: decouples the query into two parts. The sql-compliant part is executed by an Embedded version of Monetdb and everything else is executed by a post-process module which is generated by AQuery++ Compiler in C++ and then compiled and executed.</li>
-<li>K9 Execution Engine: (discontinued).</li>
-</ul>
-<h2 dir="auto"><a id="user-content-roadmap" class="anchor" aria-hidden="true" href="#roadmap"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Roadmap</h2>
-<ul class="contains-task-list">
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> SQL Parser -&gt; AQuery Parser (Front End)</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> AQuery-C++ Compiler (Back End)
-<ul class="contains-task-list">
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Schema and Data Model</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Data acquisition/output from/to csv file</li>
-</ul>
-</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Execution Engine
-<ul class="contains-task-list">
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Projections and single-group Aggregations</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Group by Aggregations</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Filters</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Order by</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Assumption</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Flatten</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> UDFs (Hybrid Engine only)</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> User Module</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Triggers</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Join (Hybrid Engine only)</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Subqueries</li>
-</ul>
-</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Query Optimization
-<ul class="contains-task-list">
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Selection/Order by push-down</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Join Optimization (Only in Hybrid Engine)</li>
-</ul>
-</li>
-</ul>
-<h2 dir="auto"><a id="user-content-known-issues" class="anchor" aria-hidden="true" href="#known-issues"><svg class="octicon octicon-link" viewBox="0 0 16 16" version="1.1" width="16" height="16" aria-hidden="true"><path fill-rule="evenodd" d="M7.775 3.275a.75.75 0 001.06 1.06l1.25-1.25a2 2 0 112.83 2.83l-2.5 2.5a2 2 0 01-2.83 0 .75.75 0 00-1.06 1.06 3.5 3.5 0 004.95 0l2.5-2.5a3.5 3.5 0 00-4.95-4.95l-1.25 1.25zm-4.69 9.64a2 2 0 010-2.83l2.5-2.5a2 2 0 012.83 0 .75.75 0 001.06-1.06 3.5 3.5 0 00-4.95 0l-2.5 2.5a3.5 3.5 0 004.95 4.95l1.25-1.25a.75.75 0 00-1.06-1.06l-1.25 1.25a2 2 0 01-2.83 0z"></path></svg></a>Known Issues:</h2>
-<ul class="contains-task-list">
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Interval based triggers</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Hot reloading server binary</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Bug fixes: type deduction misaligned in Hybrid Engine</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Investigation: Using postproc only for q1 in Hybrid Engine (make is_special always on)</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> C++ Meta-Programming: Eliminate template recursions as much as possible.</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Functionality: Basic helper functions in aquery</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox" checked=""> Improvement: More DDLs, e.g. drop table, update table, etc.</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Bug: Join-Aware Column management</li>
-<li class="task-list-item"><input type="checkbox" id="" disabled="" class="task-list-item-checkbox"> Bug: Order By after Group By</li>
-</ul>
-</article>
-          </div>
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-      An in-memory column-store time-series database that uses query compilation
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