Bug fixes on assumptions.

Other improvements.

Makefile.old

@@ -1,8 +0,0 @@
-all:
-	g++ mmw.cpp --std=c++1z -shared -fPIC -Ofast -march=native -g0 -s -o mmw.so
-avx512:
-	g++ mmw.cpp --std=c++1z -shared -fPIC -Ofast -mavx512f -g0 -s -o mmw.so
-debug:
-	g++ mmw.cpp --std=c++1z -shared -fPIC -O0 -march=native -g3 -o mmw.so
-clean:
-	rm  mmw.so -rf

README.md

@@ -1,20 +1,44 @@
-# AQuery++
+# AQuery++ DB
+## Introduction
 
-AQuery++ Compiler that compiles AQuery into C++11.
+AQuery++ Database is a cross-platform, In-Memory Column-Store Database that incorporates compiled query execution.
-Frontend built on top of [mo-sql-parsing](https://github.com/klahnakoski/mo-sql-parsing).
+Compiler frontend built on top of [mo-sql-parsing](https://github.com/klahnakoski/mo-sql-parsing).
 
 ## Roadmap
 - [x] SQL Parser -> AQuery Parser (Front End)
 - [ ] AQuery-C++ Compiler (Back End)
    -  [x] Schema and Data Model 
    -  [x] Data acquisition/output from/to csv file
-   -  [ ] Single table queries
+   -  [x] Single table queries
       -  [x] Projections and Single Table Aggregations 
       -  [x] Group by Aggregations
       -  [x] Filters
-      -  [ ] Order by
+      -  [x] Order by
-      -  [ ] Assumption
+      -  [x] Assumption
+      -  [x] Flatten
    -  [ ] Multi-table 
       -  [ ] Join
    -  [ ] Subqueries 
 - [ ] -> Optimizing Compiler
+
+## TODO:
+- [ ] C++ Meta-Programming: Elimilate template recursions as much as possible.
+- [ ] IPC: Better ways to communicate between Interpreter (Python) and Executer (C++).
+  - [ ] Sockets? stdin/stdout capture?
+
+## Requirements
+Recent version of Linux, Windows or MacOS, with recent C++ compiler that has C++17 (1z) support (e.g. gcc 6.0, MSVC 2017, clang 6.0), and python 3.6 or above.
+
+## Usage
+`python3 prompt.py` will launch the interactive command prompt. The server binary will be autometically rebuilt and started.
+#### Commands:
+- `<sql statement>`: parse sql statement
+- `f <filename>`: parse all sql statements in file
+- `print`: printout parsed sql statements
+- `exec`: execute last parsed statement(s)
+- `r`: run the last generated code snippet
+- `save <OPTIONAL: filename>`: save current code snippet. will use random filename if not specified.
+- `exit`: quit the prompt
+#### Example:
+   `f moving_avg.a` <br>
+   `exec`

engine/ast.py

@@ -15,6 +15,9 @@ class ColRef:
         self.order_pending = None # order_pending
         self.compound = compound # compound field (list as a field) 
         self.views = []
+        self.aux_columns = [] # columns for temperary calculations 
+        # e.g. order by, group by, filter by expressions
+        
         self.__arr__ = (cname, _ty, cobj, cnt, table, name, id)
     
     def reference(self):
@@ -89,7 +92,8 @@ class TableInfo:
                 type_tags = type_tags[:-1]
             type_tags += '>'
             
-            self.cxt.emit(f'auto& {base_name} = *(TableInfo{type_tags} *)(cxt->tables[{self.table_name}]);')
+            self.cxt.emit(f'auto& {base_name} = *(TableInfo{type_tags} *)(cxt->tables["{self.table_name}"]);')
+        return self.cxt_name
     def refer_all(self):
         self.reference()
         for c in self.columns:
@@ -110,7 +114,10 @@ class TableInfo:
         self.cxt.ccols_byname[cname] = col_object
         self.columns_byname[c['name']] = col_object
         self.columns.append(col_object)
-        
+    def get_size(self):
+        size_tmp = 'tmp_sz_'+base62uuid(6)
+        self.cxt.emit(f'const auto& {size_tmp} = {self.columns[0].reference()}.size;')
+        return size_tmp
     @property
     def n_cols(self):
         return len(self.columns)
@@ -136,8 +143,8 @@ class TableInfo:
 
     def get_col_d(self, col_name):
         col = self.columns_byname[col_name]
-        if type(self.rec) is list:
+        if type(self.rec) is set:
-            self.rec.append(col)
+            self.rec.add(col)
         return col
 
     def get_ccolname_d(self, col_name):
@@ -160,12 +167,12 @@ class TableInfo:
         self.alias.add(alias)
         
     def parse_tablenames(self, colExpr, materialize = True, raw = False):
-        self.get_col = self.get_col if materialize else self.get_col_d
+        # get_col = self.get_col if materialize else self.get_col_d
 
         parsedColExpr = colExpr.split('.')
         ret = None
         if len(parsedColExpr) <= 1:
-            ret = self.get_col(colExpr)
+            ret = self.get_col_d(colExpr)
         else: 
             datasource = self.cxt.tables_byname[parsedColExpr[0]]
             if datasource is None:
@@ -177,6 +184,7 @@ class TableInfo:
         if self.groupinfo is not None and ret and ret in self.groupinfo.raw_groups:
             string = f'get<{self.groupinfo.raw_groups.index(ret)}>({{y}})'
         return string, ret if raw else string
+
 class View:
     def __init__(self, context, table = None, tmp = True):
         self.table: TableInfo = table
@@ -193,6 +201,7 @@ class Context:
     extern "C" int __DLLEXPORT__ dllmain(Context* cxt) { 
         using namespace std;
         using namespace types;
+        
     '''
     def __init__(self): 
         self.tables:List[TableInfo] = []

engine/ddl.py

@@ -1,12 +1,15 @@
 # code-gen for data decl languages
 
+from engine.orderby import orderby
 from engine.ast import ColRef, TableInfo, ast_node, Context, include
+from engine.scan import scan
 from engine.utils import base62uuid
 
 class create_table(ast_node):
     name = 'create_table'
-    def __init__(self, parent: "ast_node", node, context: Context = None, cexpr = None):
+    def __init__(self, parent: "ast_node", node, context: Context = None, cexprs = None, lineage = False):
-        self.cexpr = cexpr
+        self.cexprs = cexprs
+        self.lineage = lineage
         super().__init__(parent, node, context)
     def produce(self, node): 
         if type(node) is not TableInfo:
@@ -22,13 +25,37 @@ class create_table(ast_node):
         self.context.tables_in_context[tbl] = tbl.table_name
         tbl.cxt_name = tbl.table_name
         tbl.refer_all()
-        if self.cexpr is None:
+        # create an empty new table
+        if self.cexprs is None:
             for c in tbl.columns:
                 self.emit(f"{c.cxt_name}.init();")
+        # create an output table
         else:
-            for i, c in enumerate(tbl.columns):
+            # 1 to 1 lineage.
-                self.emit(f"{c.cxt_name}.init();")
+            if len(self.context.scans) == 0:
-                self.emit(f"{c.cxt_name} = {self.cexpr[i]()};")
+                if self.lineage:
+                    order = 'order_' + base62uuid(6)
+                    self.emit(f'auto {order} = {self.parent.datasource.cxt_name}->order_by<{orderby(self.parent, self.parent.assumptions).result()}>();')
+                    self.lineage = '*' + order
+                else:
+                    self.lineage = None
+                for i, c in enumerate(tbl.columns):
+                    self.emit(f"{c.cxt_name}.init();")
+                    self.emit(f"{c.cxt_name} = {self.cexprs[i](self.lineage)};")
+                self.lineage = None
+                self.parent.assumptions = None
+            else:
+                scanner:scan = self.context.scans[-1]
+                if self.lineage:
+                    lineage_var = 'lineage_' + base62uuid(6)
+                    counter_var = 'counter_' + base62uuid(6)
+                    scanner.add(f'auto {lineage_var} = {self.datasource.cxt_name}->bind({tbl.cxt_name});', "init")
+                    scanner.add(f'auto {counter_var} = 0;', "init")
+                    scanner.add(f"{lineage_var}.emplace_back({counter_var}++);", "front")
+                    self.lineage = f"{lineage_var}.rid"
+                for i, c in enumerate(tbl.columns):
+                    scanner.add(f"{c.cxt_name}.init();", "init")
+                    scanner.add(f"{c.cxt_name} = {self.cexprs[i](scanner.it_ver)};")
                     
 class insert(ast_node):
     name = 'insert'
@@ -81,32 +108,21 @@ class outfile(ast_node):
     def produce(self, node):
         out_table:TableInfo = self.parent.out_table
         filename = node['loc']['literal'] if 'loc' in node else node['literal']
-        self.emit_no_ln(f"\"{filename}\"1:`csv@(+(")
+        sep = ',' if 'term' not in node else node['term']['literal']
-        l_compound = False
+        file_pointer = 'fp_' + base62uuid(6)
-        l_cols = ''
+        self.emit(f'FILE* {file_pointer} = fopen("{filename}", "w");')
-        l_keys = ''
+        self.emit(f'{out_table.cxt_name}->printall("{sep}", "\\n", nullptr, {file_pointer});')
-        ending = lambda x: x[:-1] if len(x) > 0 and x[-1]==';' else x
+        self.emit(f'fclose({file_pointer});')
-        for i, c in enumerate(out_table.columns):
+        # self.context.headers.add('fstream')
-            c:ColRef
+        # cout_backup_buffer = 'stdout_' + base62uuid(4)
-            l_keys += '`' + c.name
+        # ofstream = 'ofstream_' + base62uuid(6)
-            if c.compound:
+        # self.emit(f'auto {cout_backup_buffer} = cout.rdbuf();')
-                if l_compound:
+        # self.emit(f'auto {ofstream} = ofstream("{filename}");')
-                    l_cols=f'flatBOTH\'+(({ending(l_cols)});{c.cname})'
+        # self.emit(f'cout.rdbuf({ofstream}.rdbuf());')
-                else:
+        # TODO: ADD STMTS.
-                    l_compound = True
+        # self.emit(f'cout.rdbuf({cout_backup_buffer});')
-                    if i >= 1:
+        # self.emit(f'{ofstream}.close();')
-                        l_cols = f'flatRO\'+(({ending(l_cols)});{c.cname})'
+        
-                    else:
-                        l_cols = c.cname + ';'
-            elif l_compound:
-                l_cols = f'flatLO\'+(({ending(l_cols)});{c.cname})'
-            else:
-                l_cols += f"{c.cname};"
-        if not l_compound:
-            self.emit_no_ln(l_keys + '!(' + ending(l_cols) + ')')
-        else:
-            self.emit_no_ln(f'{l_keys}!+,/({ending(l_cols)})')
-        self.emit('))')
         
 import sys
 include(sys.modules[__name__])

engine/expr.py

@@ -11,10 +11,10 @@ class expr(ast_node):
         'avg': 'avg',
         'sum': 'sum',
         'count' : 'count',
-        'mins': ['mins', 'minsw'],
+        'mins': ['mins', 'minw'],
-        'maxs': ['maxs', 'maxsw'],
+        'maxs': ['maxs', 'maxw'],
-        'avgs': ['avgs', 'avgsw'],
+        'avgs': ['avgs', 'avgw'],
-        'sums': ['sums', 'sumsw'],
+        'sums': ['sums', 'sumw'],
     }
     
     binary_ops = {
@@ -23,8 +23,8 @@ class expr(ast_node):
         'mul':'*', 
         'div':'/',
         'mod':'%',
-        'and':'&',
+        'and':'&&',
-        'or':'|',
+        'or':'||',
         'xor' : '^',
         'gt':'>',
         'lt':'<',
@@ -40,13 +40,16 @@ class expr(ast_node):
         'not' : '!'
     }
     
-    coumpound_generating_ops = ['mod', 'mins', 'maxs', 'sums'] + \
+    coumpound_generating_ops = ['avgs', 'mins', 'maxs', 'sums'] + \
        list( binary_ops.keys()) + list(compound_ops.keys()) + list(unary_ops.keys() )
 
     def __init__(self, parent, node, materialize_cols = True, abs_col = False):
         self.materialize_cols = materialize_cols
         self.raw_col = None
         self.__abs = abs_col
+        self.inside_agg = False
+        if(type(parent) is expr):
+            self.inside_agg = parent.inside_agg
         ast_node.__init__(self, parent, node, None)
 
     def init(self, _):
@@ -67,7 +70,8 @@ class expr(ast_node):
         if type(node) is dict:
             for key, val in node.items():
                 if key in self.func_maps:
-                    # if type(val) in [dict, str]:
+                    # TODO: distinguish between UDF agg functions and other UDF functions.
+                    self.inside_agg = True
                     self.context.headers.add('"./server/aggregations.h"')
                     if type(val) is list and len(val) > 1:
                         cfunc = self.func_maps[key]
@@ -81,6 +85,7 @@ class expr(ast_node):
                         self._expr += f"{funcname}(" 
                         self._expr += expr(self, val)._expr
                     self._expr += ')'
+                    self.inside_agg = False
                 elif key in self.binary_ops:
                     l = expr(self, val[0])._expr
                     r = expr(self, val[1])._expr
@@ -92,7 +97,7 @@ class expr(ast_node):
                             x.append(expr(self, v)._expr)
                     self._expr = self.compound_ops[key][1](x)
                 elif key in self.unary_ops:
-                    self._expr += f'({expr(self, val)._expr}{self.unary_ops[key]})'
+                    self._expr += f'{self.unary_ops[key]}({expr(self, val)._expr})'
                 else:
                     print(f'Undefined expr: {key}{val}')
 
@@ -112,7 +117,7 @@ class expr(ast_node):
             self._expr, self.raw_col = self.datasource.parse_tablenames(node, self.materialize_cols, True)
             self.raw_col = self.raw_col if type(self.raw_col) is ColRef else None
             if self.__abs and self.raw_col:
-                self._expr = self.raw_col.reference() + index_expr
+                self._expr = self.raw_col.reference() + ("" if self.inside_agg else index_expr)
         elif type(node) is bool:
             self._expr = '1' if node else '0'
         else:

engine/groupby.py

@@ -1,8 +1,9 @@
-from engine.ast import TableInfo, ast_node
+from engine.ast import ColRef, TableInfo, ast_node
+from engine.orderby import assumption
 from engine.scan import scan
 from engine.utils import base62uuid
 from engine.expr import expr
-import engine.types
+
 class groupby(ast_node):
     name = '_groupby'
     def init(self, _):
@@ -12,7 +13,7 @@ class groupby(ast_node):
         self.group_type = 'record_type' + base62uuid(7)
         self.datasource = self.parent.datasource
         self.scanner = None
-        self.datasource.rec = []
+        self.datasource.rec = set()
         self.raw_groups = []
     def produce(self, node):
         
@@ -24,7 +25,8 @@ class groupby(ast_node):
         for i, g in enumerate(node):
             v = g['value']
             e = expr(self, v)
-            self.raw_groups.append(e.raw_col)
+            if type(e.raw_col) is ColRef:
+                self.raw_groups.append(e.raw_col)
             e = e._expr
             # if v is compound expr, create tmp cols
             if type(v) is not str:
@@ -40,7 +42,7 @@ class groupby(ast_node):
         self.emit(f'unordered_map<{self.group_type}, vector_type<uint32_t>, '
             f'transTypes<{self.group_type}, hasher>> {self.group};')
         self.n_grps = len(node)
-        self.scanner = scan(self, None, expr.toCExpr(first_col)()+'.size')
+        self.scanner = scan(self, self.datasource, expr.toCExpr(first_col)()+'.size')
         self.scanner.add(f'{self.group}[forward_as_tuple({g_contents(self.scanner.it_ver)})].emplace_back({self.scanner.it_ver});')
 
         
@@ -49,6 +51,13 @@ class groupby(ast_node):
         self.datasource.rec = None
         self.scanner.finalize()
         
+    def deal_with_assumptions(self, assumption:assumption, out:TableInfo):
+        gscanner = scan(self, self.group)
+        val_var = 'val_'+base62uuid(7)
+        gscanner.add(f'auto &{val_var} = {gscanner.it_ver}.second;')
+        gscanner.add(f'{out.cxt_name}->order_by<{assumption.result()}>(&{val_var});')
+        gscanner.finalize()
+        
     def finalize(self, cexprs, out:TableInfo):
         gscanner = scan(self, self.group)
         key_var = 'key_'+base62uuid(7)
@@ -59,3 +68,5 @@ class groupby(ast_node):
         gscanner.add(';\n'.join([f'{out.columns[i].reference()}.emplace_back({ce(x=val_var, y=key_var)})' for i, ce in enumerate(cexprs)])+';')
         
         gscanner.finalize()
+        
+        self.datasource.groupinfo = None

engine/orderby.py

@@ -16,43 +16,50 @@ class order_item:
         return ('' if self.order else '-') + f'({self.name})'
         
     def __str__(self):
-        return self.materialize()
+        return self.name
     def __repr__(self):
         return self.__str__()
 
-class orders:
-    def __init__(self, node, datasource):
-        self.order_items = []
-        self.materialized = False
-        self.view = None
-        self.node = node 
-        self.datasource = datasource
-        self.n_attrs = -1
-
-    def materialize(self):
-        if not self.materialized:
-            self.view = View(self.node.context, self.datasource, False)
-            keys = ';'.join([f'{o}' for o in self.order_items])
-            self.n_attrs = len(self.order_items)
-            self.node.emit(f"{self.view.name}: > +`j (({',' if self.n_attrs == 1 else ''}{keys}))")
-            self.materialized = True
-
-    def append(self, o):
-        self.order_items.append(o)
-
 class orderby(ast_node):
     name = '_orderby'
-    
+    def __init__(self, parent: "ast_node", node, context: Context = None):
+        self.col_list = []
+        super().__init__(parent, node, context)
     def init(self, _):
         self.datasource = self.parent.datasource
-        self.order = orders(self, self.datasource)
+        self.order = []
         self.view = ''
     def produce(self, node):
         if type(node) is not list:
             node = [node]
         for n in node:
             order =  not ('sort' in n and n['sort'] == 'desc')
-            self.order.append(order_item(n['value'], self, order))
+            col_id = self.datasource.columns_byname[n['value']].id
+            col_id = col_id if order else -col_id-1
+            if col_id not in self.col_list:
+                self.col_list.append(col_id)
+                self.order.append(order_item(n['value'], self, order))
+            
+    def merge(self, node):
+        self.produce(node)
+        
+    def finialize(self, references):
+        self.order = [ o for o in self.order if o.name in references ]
+    
+    def result(self, sep:str = ','):
+        return sep.join([f"{c}" for c in self.col_list])
+
+class assumption(orderby):
+    name = '_assumption'
+    def __init__(self, parent: "ast_node", node, context: Context = None, exclude = []):
+        self.exclude = exclude
+        super().__init__(parent, node, context)
+    
+    def produce(self, node):
+        if type(node) is not list:
+            node = [node]
+        [n for n in node if n not in self.exclude]
+        return super().produce(node)
     
-    def consume(self, _):
+    def empty(self):
-        self.datasource.order.append(self.order)
+        return len(self.col_list) == 0

engine/projection.py

@@ -2,9 +2,9 @@ from engine.ast import ColRef, TableInfo, ast_node, Context, include
 from engine.groupby import groupby
 from engine.join import join
 from engine.expr import expr
-from engine.orderby import orderby
+from engine.orderby import assumption, orderby
 from engine.scan import filter
-from engine.utils import base62uuid, enlist, base62alp
+from engine.utils import base62uuid, enlist, base62alp, has_other
 from engine.ddl import create_table, outfile
 import copy
 
@@ -14,6 +14,8 @@ class projection(ast_node):
         self.disp = disp
         self.outname = outname
         self.group_node = None
+        self.assumptions = None
+        self.where = None
         ast_node.__init__(self, parent, node, context)
     def init(self, _):
         if self.outname is None:
@@ -44,8 +46,7 @@ class projection(ast_node):
                     elif type(value) is str:
                         self.datasource = self.context.tables_byname[value]
                 if 'assumptions' in from_clause:
-                    for assumption in enlist(from_clause['assumptions']):
+                    self.assumptions = enlist(from_clause['assumptions'])
-                        orderby(self, assumption)
                     
             elif type(from_clause) is str:
                 self.datasource = self.context.tables_byname[from_clause]
@@ -58,8 +59,9 @@ class projection(ast_node):
             self.prev_datasource = self.context.datasource
             self.context.datasource = self.datasource            
         if 'where' in node:
-            self.datasource = filter(self, node['where'], True).output
+            self.where = filter(self, node['where'], True)
-            self.context.datasource = self.datasource            
+            # self.datasource = filter(self, node['where'], True).output
+            # self.context.datasource = self.datasource            
 
         if 'groupby' in node:
             self.group_node = groupby(self, node['groupby'])
@@ -71,10 +73,7 @@ class projection(ast_node):
     def consume(self, node):
         self.inv = True
         disp_varname = 'd'+base62uuid(7)
-        has_groupby = False
+        has_groupby = self.group_node is not None
-        if self.group_node is not None:
-            # There is group by;
-            has_groupby = True
         cexprs = []
         flatten = False
         cols = []
@@ -82,51 +81,93 @@ class projection(ast_node):
         if 'outfile' in node:
             flatten = True
         
+        new_names = []
+        proj_raw_cols = []
         for i, proj in enumerate(self.projections):
             cname = ''
             compound = False
-            self.datasource.rec = []
+            self.datasource.rec = set()
             if type(proj) is dict:
                 if 'value' in proj:
                     e = proj['value']
-                    sname = expr(self, e)._expr
+                    sname = expr(self, e)
-                    fname = expr.toCExpr(sname)
+                    if type(sname.raw_col) is ColRef:
-                    absname = expr(self, e, abs_col=True)._expr
+                        proj_raw_cols.append(sname.raw_col)
-                    compound = True
+                    sname = sname._expr
+                    fname = expr.toCExpr(sname) # fastest access method at innermost context
+                    absname = expr(self, e, abs_col=True)._expr # absolute name at function scope
+                    # TODO: Make it single pass here.
+                    compound = True # compound column
                     cexprs.append(fname)
-                    cname = ''.join([a if a in base62alp else '' for a in fname()])
+                    cname = e if type(e) is str else ''.join([a if a in base62alp else '' for a in expr.toCExpr(absname)()])
+                if 'name' in proj: # renaming column by AS keyword
+                    cname = proj['name']
+                    new_names.append(cname)
+            elif type(proj) is str:
+                col = self.datasource.get_col_d(proj)
+                if type(col) is ColRef:
+                    col.reference()
+                    
+            compound = compound and has_groupby and has_other(self.datasource.rec, self.group_node.referenced)
+            self.datasource.rec = None
+            
+            typename = f'decays<decltype({absname})>'
+            if not compound:
+                typename = f'value_type<{typename}>'
                 
-            compound = compound and has_groupby and self.datasource.rec not in self.group_node.referenced
+            cols.append(ColRef(cname, expr.toCExpr(typename)(), self.out_table, 0, None, cname, i, compound=compound))
             
-            cols.append(ColRef(cname, expr.toCExpr(f'decays<decltype({absname})>')(0), self.out_table, 0, None, cname, i, compound=compound))
         self.out_table.add_cols(cols, False)
         
+        lineage = None
+        
         if has_groupby:
-            create_table(self, self.out_table)
+            create_table(self, self.out_table) # creates empty out_table.
+            if self.assumptions is not None:
+                self.assumptions = assumption(self, self.assumptions, exclude=self.group_node.raw_groups)
+                if not self.assumptions.empty():
+                    self.group_node.deal_with_assumptions(self.assumptions, self.out_table)
+                self.assumptions = None
             self.group_node.finalize(cexprs, self.out_table)
         else:
-            create_table(self, self.out_table, cexpr = cexprs)
+            # if all assumptions in projections, treat as orderby
-        self.datasource.group_node = None
+            lineage = self.assumptions is not None and has_other(self.assumptions, proj_raw_cols) 
-
+            spawn = create_table(self, self.out_table, cexprs = cexprs, lineage = lineage) # create and populate out_table.
-        has_orderby = 'orderby' in node
+            if lineage and type(spawn.lineage) is str:
+                lineage = spawn.lineage
+                self.assumptions = orderby(self, self.assumptions) # do not exclude proj_raw_cols
+            else:
+                lineage = None
+        if self.where is not None:
+            self.where.finalize()
+        
+        if type(lineage) is str:
+            order = 'order_' + base62uuid(6)
+            self.emit(f'auto {order} = {self.datasource.cxt_name}->order_by<{self.assumptions.result()}>({lineage});')
+            self.emit(f'{self.out_table.cxt_name}->materialize(*{order});')
+            self.assumptions = None
+        
+        if self.assumptions is not None:
+            orderby_node = orderby(self, self.assumptions)
+        else:
+            orderby_node = None
             
-        if has_orderby:
+        if 'orderby' in node:
             self.datasource = self.out_table
             self.context.datasource = self.out_table # discard current ds
-            orderby_node = orderby(self, node['orderby'])
+            orderbys = node['orderby']
-            self.context.datasource.materialize_orderbys()
+            orderby_node = orderby(self, orderbys) if orderby_node is None else orderby_node.merge(orderbys)
-            self.emit_no_ln(f"{f'{disp_varname}:+' if flatten else ''}(")
-            
-        if self.disp or has_orderby:
-            self.emit(f'print(*{self.out_table.cxt_name});')
         
-        if has_orderby:
+        if orderby_node is not None:
-            self.emit(f')[{orderby_node.view}]')
+            self.emit(f'auto {disp_varname} = {self.out_table.reference()}->order_by_view<{orderby_node.result()}>();')
         else:
-            self.context.emit_flush()
+            disp_varname = f'*{self.out_table.cxt_name}'
+            
+        if self.disp:
+            self.emit(f'print({disp_varname});')
+            
+
         if flatten:
-            if len(self.projections) > 1 and not self.inv:
-                self.emit(f"{disp_varname}:+{disp_varname}")
             outfile(self, node['outfile'])
 
         if self.datasource_changed:

engine/scan.py

@@ -5,16 +5,20 @@ from engine.expr import expr
 
 class scan(ast_node):
     name = 'scan'
-    def __init__(self, parent: "ast_node", node, size = None, context: Context = None):
+    def __init__(self, parent: "ast_node", node, size = None, context: Context = None, const = False):
         self.type = type
         self.size = size
+        self.const = "const " if const else ""
         super().__init__(parent, node, context)
     def init(self, _):
         self.datasource = self.context.datasource
+        self.initializers = ''
         self.start = ''
+        self.front = ''
         self.body = ''
         self.end = '}'
-        self.filter = None
+        self.mode = None
+        self.filters = []
         scan_vars = set(s.it_var for s in self.context.scans)
         self.it_ver = 'i' + base62uuid(2)
         while(self.it_ver in scan_vars):
@@ -22,19 +26,33 @@ class scan(ast_node):
         self.parent.context.scans.append(self)
     def produce(self, node):
         if type(node) is ColRef:
+            self.colref = node
             if self.size is None:
-                self.start += f'for (auto& {self.it_ver} : {node.reference()}) {{\n'
+                self.mode = ["col", node.table]
+                self.start += f'for ({self.const}auto& {self.it_ver} : {node.reference()}) {{\n'
             else:
+                self.mode = ["idx", node.table]
                 self.start += f"for (uint32_t {self.it_ver} = 0; {self.it_ver} < {node.reference()}.size; ++{self.it_ver}){{\\n"
         elif type(node) is str:
-            self.start+= f'for(auto& {self.it_ver} : {node}) {{\n'
+            self.mode = ["idx", None]
+            self.start+= f'for({self.const}auto& {self.it_ver} : {node}) {{\n'
         else:
+            self.mode = ["idx", node] # Node is the TableInfo
             self.start += f"for (uint32_t {self.it_ver} = 0; {self.it_ver} < {self.size}; ++{self.it_ver}){{\n"
             
-    def add(self, stmt):
+    def add(self, stmt, position = "body"):
-        self.body+=stmt + '\n'
+        if position == "body":
+            self.body += stmt + '\n'
+        elif position == "init":
+            self.initializers += stmt + '\n'
+        else:
+            self.front += stmt + '\n'
+            
     def finalize(self):
-        self.context.remove_scan(self, self.start + self.body + self.end)
+        for f in self.filters:
+            self.start += f
+            self.end += '}'
+        self.context.remove_scan(self, self.initializers + self.start + self.front + self.body + self.end)
         
 class filter(ast_node):
     name = 'filter'
@@ -65,8 +83,17 @@ class filter(ast_node):
                 for o, c in zip(self.output.columns, self.datasource.columns):
                     self.emit(f'{o.cname}:$[{tmpVar};{c.cname};()]')
     
-    def consume(self, node):
+    def finalize(self):
+        self.scanner.finalize()
+    def consume(self, _):
         # TODO: optimizations after converting expr to cnf
+        self.scanner = None
+        for s in self.context.scans:
+            if self.datasource == s.mode[1]:
+                self.scanner = s
+                break
+        if self.scanner is None:
+            self.scanner = scan(self, self.datasource, self.datasource.get_size())
         self.expr = expr(self, self.modified_node)
-        print(node)
+        self.scanner.filters.append(f'if ({self.expr.cexpr(self.scanner.it_ver)}) {{\n')
     

engine/utils.py

@@ -17,3 +17,9 @@ def enlist(l):
 
 def seps(s, i, l):
     return s if i < len(l) - 1 else ''
+
+def has_other(a, b):
+    for ai in a:
+        if ai not in b:
+            return True
+    return False

header.k

@@ -1,68 +0,0 @@
-import`csv
-
-md:{y-x*_y%x}
-
-maxs:{[L]{max(x, y)}\L}
-mins:{[L]{min(x, y)}\L}
-sums:{[L]{(x + y)}\L}
-
-avgsimpl:{[L;i] curr:L[i]%(i+1); $[i<(#L)-1;curr, avgsimpl[L;i+1];curr]}
-avgs:{[L] avgsimpl[sums[L];0]}
-
-/ maxswimp:{[L;w;i] curr:max(L@(((i-w)+!w)|0)); $[i<#L;curr, maxswimp[L; w; i + 1];curr]}
-/ maxsw:{[w;L]maxswimp[L; w; 1]}
-
-/ minswimp:{[L;w;i] curr:min(L@(((i-w)+!w)|0)); $[i<#L;curr, maxswimp[L; w; i + 1];curr]}
-/ minsw:{[w;L]minswimp[L;w;1]}
-
-/ avgswimp:{[L;w;s;i] s:(s+L[i])-L[i-w];curr:s%((i+1)&w);$[i<(#L)-1; curr, avgswimp[L; w; s; i+1]; curr]}
-/ avgsw:{[w;L] avgswimp[L;w;0;0]}
-
-/ sumswimp:{[L;w;s;i] s:(s+L[i])-L[i-w];$[i<(#L)-1; s, sumswimp[L; w; s; i+1]; s]}
-/ sumsw:{[w;L] sumswimp[L;w;0;0]}
-
-
-groupby0:{[L] 
-            {[x;y]
-                x:$[(@x)=`i;(,(L[0]))!,(,0);x];
-                k:(,(L[y]));gvk:x[k][0];
-                found:$[(gvk[0]+gvk[1])>0;1;L[y] in !x];
-                cg:(,L[y])!$[found;,gvk[0],y;,(,y)];
-                (x,cg)}/!(#L)}
-
-groupBy:{[x]groupBySingle:{[a;x]
-        findAll:{[c;xx]
-            f:{[i;c]$[(c[0])[i]~c[1];i+1;0]};
-            @[!#xx;!#xx;f;(#xx)#,(xx;c)]};
-        z:findAll[a;x];
-        b:(findAll[0;z]_(!(1+#z)))-1;(a;b)};
-    x:+x;y:?x;
-    @[y;!#y;groupBySingle;(#y)#,x]}
-
-groupby:{[L]
-        L:^+L;
-        dimy:(#(L[0]))-1;
-        ((({[L;dim;x;y] 
-            x:$[x~0;(,(dim#(L[0])),0);x];
-            curr:dim#(L[y]);
-            $[(dim#*x)~curr;x;((,curr,y),x)]}[L;dimy])/!(#L));(+L)[dimy]) }
-
-lststr:{[L](+({[x;y] ($x,$y)}/L))[0]}
-delist:{[L] $[(@L)in(`LL`LC`LG`L);delist[(,/L)];L]}
-cntlist:{[L;i] $[(@L)in(`LL`LC`LG`L);cntlist[(,/L);i+1];i+1]}
-flatRO:{[x]x[0],/:x[1]}
-flatLO:{[x]x[0],\:x[1]}
-flatBOTH:{[x],/(x[0],/:\:x[1])}
-
-
-sumswkrl:{[L;w;x;y] ((x-L[y-w])+L[y])}
-sumsw:{[w;L] $[(#L)=0;L;(sumswkrl[L;w])\@[!#L;0;L[file 0]]]}
-avgswkrl:{[L;w;x;y] (x-(L[y-w]-L[y])%w)}
-avgsw:{[w;L] $[(#L)=0;L;(avgswkrl[L;w])\@[!#L;0;L[0]]]}
-
-/ minsw:{[w;L] ({[L;w;x] min(L[$[x>w;(!w) + ((x-w)+1);!(x+1)]])}[L;w])'!#L}
-import`mmw
-minsw:{[w;L] ret:L; mmw[ret;((`g ($@ret)[0]), (#ret), w, 65536)];ret}
-maxsw:{[w;L] ret:L; mmw[ret;((`g ($@ret)[0]), (#ret), w, 65537)];ret}
-minswip:{[w;L] mmw[L;((`g ($@L)[0]), (#L), w, 65536)];}
-maxswip:{[w;L] mmw[L;((`g ($@L)[0]), (#L), w, 65537)];}

join.k

@@ -1 +0,0 @@
-{[I;L;R;i] t:&(I[i]);d:(#t);$[d=0;!0;+(Aa[t];Ab[t];d#(Bb[i]))]}[(Aa {x>(y*10)}/: Ba); Aa; Ba]'!#Aa

moving_avg.a

@@ -8,7 +8,7 @@ SELECT Month,avgs(3,sales)
 FROM sale
      ASSUMING ASC Month
 INTO OUTFILE "moving_avg_output.csv"
-FIELDS TERMINATED BY ","
+FIELDS TERMINATED BY ";"
 
 select sales, mins(2,Month) from sale group by sales
 into outfile "flatten.csv" 

msc-plugin/lineage.hpp

@@ -0,0 +1,5 @@
+#pragma once
+template <class...T1, class ...T2>
+struct lineage {
+	
+};

msc-plugin/msc-plugin.vcxproj

@@ -93,6 +93,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -108,6 +109,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -123,6 +125,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -138,6 +141,7 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>

msvs-py/msvs-py.pyproj

@@ -0,0 +1,93 @@
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="4.0">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <SchemaVersion>2.0</SchemaVersion>
+    <ProjectGuid>ccc243f5-663e-45b7-a6de-b2468c58b3a7</ProjectGuid>
+    <ProjectHome>.</ProjectHome>
+    <StartupFile>
+    </StartupFile>
+    <SearchPath>..\msvs-py</SearchPath>
+    <WorkingDirectory>.</WorkingDirectory>
+    <OutputPath>.</OutputPath>
+    <Name>msvs-py</Name>
+    <RootNamespace>msvs-py</RootNamespace>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">
+    <DebugSymbols>true</DebugSymbols>
+    <EnableUnmanagedDebugging>false</EnableUnmanagedDebugging>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+    <DebugSymbols>true</DebugSymbols>
+    <EnableUnmanagedDebugging>false</EnableUnmanagedDebugging>
+  </PropertyGroup>
+  <ItemGroup>
+    <Folder Include="..\aquery_parser\" />
+    <Folder Include="..\aquery_parser\__pycache__\" />
+    <Folder Include="..\engine\" />
+    <Folder Include="..\engine\__pycache__\" />
+    <Folder Include="parser\" />
+    <Folder Include="parser\__pycache__\" />
+    <Folder Include="__pycache__\" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="..\aquery_parser\keywords.py" />
+    <Compile Include="..\aquery_parser\sql_parser.py" />
+    <Compile Include="..\aquery_parser\types.py" />
+    <Compile Include="..\aquery_parser\utils.py" />
+    <Compile Include="..\aquery_parser\windows.py" />
+    <Compile Include="..\aquery_parser\__init__.py" />
+    <Compile Include="..\engine\ast.py" />
+    <Compile Include="..\engine\ddl.py" />
+    <Compile Include="..\engine\expr.py" />
+    <Compile Include="..\engine\groupby.py" />
+    <Compile Include="..\engine\join.py" />
+    <Compile Include="..\engine\orderby.py" />
+    <Compile Include="..\engine\projection.py" />
+    <Compile Include="..\engine\scan.py" />
+    <Compile Include="..\engine\types.py" />
+    <Compile Include="..\engine\utils.py" />
+    <Compile Include="..\engine\__init__.py" />
+    <Compile Include="..\prompt.py" />
+  </ItemGroup>
+  <ItemGroup>
+    <Content Include="..\aquery_parser\__pycache__\keywords.cpython-310.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\keywords.cpython-39.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\sql_parser.cpython-310.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\sql_parser.cpython-39.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\types.cpython-310.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\types.cpython-39.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\utils.cpython-310.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\utils.cpython-39.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\windows.cpython-310.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\windows.cpython-39.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\__init__.cpython-310.pyc" />
+    <Content Include="..\aquery_parser\__pycache__\__init__.cpython-39.pyc" />
+    <Content Include="..\engine\__pycache__\ast.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\ast.cpython-39.pyc" />
+    <Content Include="..\engine\__pycache__\ddl.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\ddl.cpython-39.pyc" />
+    <Content Include="..\engine\__pycache__\expr.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\expr.cpython-39.pyc" />
+    <Content Include="..\engine\__pycache__\groupby.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\join.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\join.cpython-39.pyc" />
+    <Content Include="..\engine\__pycache__\orderby.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\projection.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\projection.cpython-39.pyc" />
+    <Content Include="..\engine\__pycache__\scan.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\types.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\utils.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\utils.cpython-39.pyc" />
+    <Content Include="..\engine\__pycache__\__init__.cpython-310.pyc" />
+    <Content Include="..\engine\__pycache__\__init__.cpython-39.pyc" />
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\Python Tools\Microsoft.PythonTools.targets" />
+  <!-- Uncomment the CoreCompile target to enable the Build command in
+       Visual Studio and specify your pre- and post-build commands in
+       the BeforeBuild and AfterBuild targets below. -->
+  <!--<Target Name="CoreCompile" />-->
+  <Target Name="BeforeBuild">
+  </Target>
+  <Target Name="AfterBuild">
+  </Target>
+</Project>

out.cpp

@@ -1,60 +1,61 @@
+#include "./server/hasher.h"
 #include "./server/aggregations.h"
+#include "csv.h"
 #include "./server/libaquery.h"
+#include <unordered_map>
 
     extern "C" int __DLLEXPORT__ dllmain(Context* cxt) { 
         using namespace std;
         using namespace types;
-    auto stocks = new TableInfo<int,int>("stocks", 2);
-cxt->tables.insert({"stocks", stocks});
-auto& stocks_timestamp = *(ColRef<int> *)(&stocks->colrefs[0]);
-auto& stocks_price = *(ColRef<int> *)(&stocks->colrefs[1]);
-stocks_timestamp.init();
-stocks_price.init();
-stocks_timestamp.emplace_back(1);
-stocks_price.emplace_back(15);
-stocks_timestamp.emplace_back(2);
-stocks_price.emplace_back(19);
-stocks_timestamp.emplace_back(3);
-stocks_price.emplace_back(16);
-stocks_timestamp.emplace_back(4);
-stocks_price.emplace_back(17);
-stocks_timestamp.emplace_back(5);
-stocks_price.emplace_back(15);
-stocks_timestamp.emplace_back(6);
-stocks_price.emplace_back(13);
-stocks_timestamp.emplace_back(7);
-stocks_price.emplace_back(5);
-stocks_timestamp.emplace_back(8);
-stocks_price.emplace_back(8);
-stocks_timestamp.emplace_back(9);
-stocks_price.emplace_back(7);
-stocks_timestamp.emplace_back(10);
-stocks_price.emplace_back(13);
-stocks_timestamp.emplace_back(11);
-stocks_price.emplace_back(11);
-stocks_timestamp.emplace_back(12);
-stocks_price.emplace_back(14);
-stocks_timestamp.emplace_back(13);
-stocks_price.emplace_back(10);
-stocks_timestamp.emplace_back(14);
-stocks_price.emplace_back(5);
-stocks_timestamp.emplace_back(15);
-stocks_price.emplace_back(2);
-stocks_timestamp.emplace_back(16);
-stocks_price.emplace_back(5);
-auto out_ZPYh = new TableInfo<decays<decltype(max((stocks_price[0]-min(stocks_timestamp[0]))))>>("out_ZPYh", 1);
-cxt->tables.insert({"out_ZPYh", out_ZPYh});
-auto& out_ZPYh_maxstockspriceminstockstimestamp = *(ColRef<decays<decltype(max((stocks_price[0]-min(stocks_timestamp[0]))))>> *)(&out_ZPYh->colrefs[0]);
-out_ZPYh_maxstockspriceminstockstimestamp.init();
-out_ZPYh_maxstockspriceminstockstimestamp = max((stocks_price-min(stocks_timestamp)));
-print(*out_ZPYh);
         
-auto out_1ac3 = new TableInfo<decays<decltype(max((stocks_price[0]-mins(stocks_price[0]))))>>("out_1ac3", 1);
+    auto sale = new TableInfo<int,int>("sale", 2);
-cxt->tables.insert({"out_1ac3", out_1ac3});
+cxt->tables.insert({"sale", sale});
-auto& out_1ac3_maxstockspriceminsstocksprice = *(ColRef<decays<decltype(max((stocks_price[0]-mins(stocks_price[0]))))>> *)(&out_1ac3->colrefs[0]);
+auto& sale_Month = *(ColRef<int> *)(&sale->colrefs[0]);
-out_1ac3_maxstockspriceminsstocksprice.init();
+auto& sale_sales = *(ColRef<int> *)(&sale->colrefs[1]);
-out_1ac3_maxstockspriceminsstocksprice = max((stocks_price-mins(stocks_price)));
+sale_Month.init();
-print(*out_1ac3);
+sale_sales.init();
+io::CSVReader<2> csv_reader_6T89Ll("moving_avg.csv");
+csv_reader_6T89Ll.read_header(io::ignore_extra_column, "Month","sales");
+int tmp_5vttJ2yV;
+int tmp_2ckq15YU;
+while(csv_reader_6T89Ll.read_row(tmp_5vttJ2yV,tmp_2ckq15YU)) { 
 
+sale_Month.emplace_back(tmp_5vttJ2yV);
+sale_sales.emplace_back(tmp_2ckq15YU);
+}
+auto out_2UiD = new TableInfo<value_type<decays<decltype(sale_Month)>>,value_type<decays<decltype(avgw(3,sale_sales))>>>("out_2UiD", 2);
+cxt->tables.insert({"out_2UiD", out_2UiD});
+auto& out_2UiD_Month = *(ColRef<value_type<decays<decltype(sale_Month)>>> *)(&out_2UiD->colrefs[0]);
+auto& out_2UiD_avgw3salesales = *(ColRef<value_type<decays<decltype(avgw(3,sale_sales))>>> *)(&out_2UiD->colrefs[1]);
+auto order_1NNZ9F = sale->order_by<0>();
+out_2UiD_Month.init();
+out_2UiD_Month = sale_Month[*order_1NNZ9F];
+out_2UiD_avgw3salesales.init();
+out_2UiD_avgw3salesales = avgw(3,sale_sales[*order_1NNZ9F]);
+print(*out_2UiD);
+FILE* fp_6xIJn4 = fopen("moving_avg_output.csv", "w");
+out_2UiD->printall(";", "\n", nullptr, fp_6xIJn4);
+fclose(fp_6xIJn4);
+typedef record<decltype(sale_sales[0])> record_type6Lepq5T;
+unordered_map<record_type6Lepq5T, vector_type<uint32_t>, transTypes<record_type6Lepq5T, hasher>> g4loWjmn;
+for (uint32_t i5g = 0; i5g < sale_sales.size; ++i5g){
+g4loWjmn[forward_as_tuple(sale_sales[i5g])].emplace_back(i5g);
+}
+auto out_2YlO = new TableInfo<value_type<decays<decltype(sale_sales)>>,decays<decltype(minw(2,sale_Month))>>("out_2YlO", 2);
+cxt->tables.insert({"out_2YlO", out_2YlO});
+auto& out_2YlO_sales = *(ColRef<value_type<decays<decltype(sale_sales)>>> *)(&out_2YlO->colrefs[0]);
+auto& out_2YlO_minw2saleMonth = *(ColRef<decays<decltype(minw(2,sale_Month))>> *)(&out_2YlO->colrefs[1]);
+out_2YlO_sales.init();
+out_2YlO_minw2saleMonth.init();
+for(auto& iFU : g4loWjmn) {
+auto &key_3AwvKMR = iFU.first;
+auto &val_7jtE12E = iFU.second;
+out_2YlO_sales.emplace_back(get<0>(key_3AwvKMR));
+out_2YlO_minw2saleMonth.emplace_back(minw(2,sale_Month[val_7jtE12E]));
+}
+print(*out_2YlO);
+FILE* fp_45ld6S = fopen("flatten.csv", "w");
+out_2YlO->printall(",", "\n", nullptr, fp_45ld6S);
+fclose(fp_45ld6S);
 return 0;
 }

out_attempt1.cpp

@@ -0,0 +1,60 @@
+#include "./server/libaquery.h"
+#include <unordered_map>
+#include "./server/hasher.h"
+#include "csv.h"
+#include "./server/aggregations.h"
+
+    extern "C" int __DLLEXPORT__ dllmain(Context* cxt) { 
+        using namespace std;
+        using namespace types;
+        
+    auto sale = new TableInfo<int,int>("sale", 2);
+cxt->tables.insert({"sale", sale});
+auto& sale_Month = *(ColRef<int> *)(&sale->colrefs[0]);
+auto& sale_sales = *(ColRef<int> *)(&sale->colrefs[1]);
+sale_Month.init();
+sale_sales.init();
+io::CSVReader<2> csv_reader_53ychC("moving_avg.csv");
+csv_reader_53ychC.read_header(io::ignore_extra_column, "Month","sales");
+int tmp_7ttMnHd3;
+int tmp_5nHjeAtP;
+while(csv_reader_53ychC.read_row(tmp_7ttMnHd3,tmp_5nHjeAtP)) { 
+
+sale_Month.emplace_back(tmp_7ttMnHd3);
+sale_sales.emplace_back(tmp_5nHjeAtP);
+}
+auto out_3Xio = new TableInfo<decays<decltype(sale_Month[0])>,decays<decltype(avgw(3,sale_sales))>>("out_3Xio", 2);
+cxt->tables.insert({"out_3Xio", out_3Xio});
+auto& out_3Xio_Month = *(ColRef<decays<decltype(sale_Month[0])>> *)(&out_3Xio->colrefs[0]);
+auto& out_3Xio_avgsw3salesales = *(ColRef<decays<decltype(avgw(3,sale_sales))>> *)(&out_3Xio->colrefs[1]);
+out_3Xio_Month.init();
+out_3Xio_Month = sale_Month;
+out_3Xio_avgsw3salesales.init();
+out_3Xio_avgsw3salesales = avgw(3,sale_sales);
+// print(*out_3Xio);
+FILE* fp_4nKGhD = fopen("moving_avg_output.csv", "w");
+out_3Xio->printall(",", "\n", nullptr, fp_4nKGhD);
+fclose(fp_4nKGhD);
+typedef record<decltype(sale_sales[0])> record_type1H2vDGL;
+unordered_map<record_type1H2vDGL, vector_type<uint32_t>, transTypes<record_type1H2vDGL, hasher>> g6Mjxfk5;
+for (uint32_t i7u = 0; i7u < sale_sales.size; ++i7u){
+g6Mjxfk5[forward_as_tuple(sale_sales[i7u])].emplace_back(i7u);
+}
+auto out_2IU2 = new TableInfo<decays<decltype(sale_sales[0])>,decays<decltype(minw(2,sale_Month))>>("out_2IU2", 2);
+cxt->tables.insert({"out_2IU2", out_2IU2});
+auto& out_2IU2_sales = *(ColRef<decays<decltype(sale_sales[0])>> *)(&out_2IU2->colrefs[0]);
+auto& out_2IU2_minsw2saleMonth = *(ColRef<decays<decltype(minw(2,sale_Month))>> *)(&out_2IU2->colrefs[1]);
+out_2IU2_sales.init();
+out_2IU2_minsw2saleMonth.init();
+for(auto& i5J : g6Mjxfk5) {
+auto &key_4jl5toH = i5J.first;
+auto &val_VJGwVwH = i5J.second;
+out_2IU2_sales.emplace_back(get<0>(key_4jl5toH));
+out_2IU2_minsw2saleMonth.emplace_back(minw(2,sale_Month[val_VJGwVwH]));
+}
+// print(*out_2IU2);
+FILE* fp_18R4fY = fopen("flatten.csv", "w");
+out_2IU2->printall(",","\n", nullptr, fp_18R4fY);
+fclose(fp_18R4fY);
+return 0;
+}

out_working.cpp

@@ -1,46 +0,0 @@
-#include "./server/libaquery.h"
-#include <cstdio>
-#include <threads.h>
-extern "C" int dllmain(Context *cxt)
-{
-    auto stocks = new TableInfo<int, int>("stocks", 2);
-    cxt->tables.insert(std::make_pair("stocks", stocks));
-    stocks->colrefs[0].ty = types::AINT;
-    stocks->colrefs[1].ty = types::AINT;
-    auto &stocks_0 = *(ColRef<int> *)(&stocks->colrefs[0]);
-    auto &stocks_1 = *(ColRef<int> *)(&stocks->colrefs[1]);
-    stocks_0.emplace_back(1);
-    stocks_1.emplace_back(15);
-    stocks_0.emplace_back(2);
-    stocks_1.emplace_back(19);
-    stocks_0.emplace_back(3);
-    stocks_1.emplace_back(16);
-    stocks_0.emplace_back(4);
-    stocks_1.emplace_back(17);
-    stocks_0.emplace_back(5);
-    stocks_1.emplace_back(15);
-    stocks_0.emplace_back(6);
-    stocks_1.emplace_back(13);
-    stocks_0.emplace_back(7);
-    stocks_1.emplace_back(5);
-    stocks_0.emplace_back(8);
-    stocks_1.emplace_back(8);
-    stocks_0.emplace_back(9);
-    stocks_1.emplace_back(7);
-    stocks_0.emplace_back(10);
-    stocks_1.emplace_back(13);
-    stocks_0.emplace_back(11);
-    stocks_1.emplace_back(11);
-    stocks_0.emplace_back(12);
-    stocks_1.emplace_back(14);
-    stocks_0.emplace_back(13);
-    stocks_1.emplace_back(10);
-    stocks_0.emplace_back(14);
-    stocks_1.emplace_back(5);
-    stocks_0.emplace_back(15);
-    stocks_1.emplace_back(2);
-    stocks_0.emplace_back(16);
-    stocks_1.emplace_back(5);
-    printf("%d\n", max(stocks_0 - min(stocks_1)));
-    return 0;
-}

prompt.py

@@ -1,6 +1,8 @@
 from concurrent.futures import thread
 import re
 import time
+
+from mo_parsing import ParseException
 import aquery_parser as parser
 import engine
 import subprocess
@@ -90,6 +92,8 @@ cxt = None
 while test_parser:
     try:
         if server.poll() is not None:
+            mm.seek(0,os.SEEK_SET)
+            mm.write(b'\x01\x00')
             server = subprocess.Popen(["./server.bin", shm])
         q = input()
         if q == 'exec':
@@ -126,6 +130,15 @@ while test_parser:
                 mm.seek(0,os.SEEK_SET)  
                 mm.write(b'\x01\x01')
             continue
+        elif q.startswith('save'):
+            filename = re.split(' |\t', q)
+            if (len(filename) > 1):
+                filename = filename[1]
+            else:
+                filename = f'out_{base62uuid(4)}.cpp'
+            with open(filename, 'wb') as outfile:
+                outfile.write((cxt.finalize()).encode('utf-8'))
+            continue
         trimed = ws.sub(' ', q.lower()).split(' ') 
         if trimed[0].startswith('f'):
             fn = 'stock.a' if len(trimed) <= 1 or len(trimed[1]) == 0 \
@@ -137,7 +150,7 @@ while test_parser:
             continue
         stmts = parser.parse(q)
         print(stmts)
-    except (ValueError, FileNotFoundError) as e:
+    except (ValueError, FileNotFoundError, ParseException) as e:
         rm()
         print(type(e), e)
 

q1.sql

@@ -7,4 +7,4 @@ FIELDS TERMINATED BY ","
 SELECT sum(c), b, d
 FROM test
 group by a,b,d
--- order by d DESC, b ASC
+order by d DESC, b ASC

server/aggregations.h

@@ -39,10 +39,10 @@ T min(const VT<T>& v) {
 	return min_v;
 }
 template<class T, template<typename ...> class VT>
-VT<T> mins(const VT<T>& arr) {
+decayed_t<VT,T> mins(const VT<T>& arr) {
-	const int& len = arr.size;
+	const uint32_t& len = arr.size;
 	std::deque<std::pair<T, uint32_t>> cache;
-	VT<T> ret(len);
+	decayed_t<VT,T> ret(len);
 	T min = std::numeric_limits<T>::max();
 	for (int i = 0; i < len; ++i) {
 		if (arr[i] < min)
@@ -52,9 +52,9 @@ VT<T> mins(const VT<T>& arr) {
 	return ret;
 }
 template<class T, template<typename ...> class VT>
-VT<T> maxs(const VT<T>& arr) {
+decayed_t<VT,T> maxs(const VT<T>& arr) {
-	const int& len = arr.size;
+	const uint32_t& len = arr.size;
-	VT<T> ret(len);
+	decayed_t<VT,T> ret(len);
 	T max = std::numeric_limits<T>::min();
 	for (int i = 0; i < len; ++i) {
 		if (arr[i] > max)
@@ -65,9 +65,9 @@ VT<T> maxs(const VT<T>& arr) {
 }
 
 template<class T, template<typename ...> class VT>
-VT<T> minw(const VT<T>& arr, uint32_t w) {
+decayed_t<VT,T> minw(uint32_t w, const VT<T>& arr) {
-	const int& len = arr.size;
+	const uint32_t& len = arr.size;
-	VT<T> ret(len);
+	decayed_t<VT,T> ret{len};
 	std::deque<std::pair<T, uint32_t>> cache;
 	for (int i = 0; i < len; ++i) {
 		if (!cache.empty() && cache.front().second == i - w) cache.pop_front();
@@ -79,9 +79,9 @@ VT<T> minw(const VT<T>& arr, uint32_t w) {
 }
 
 template<class T, template<typename ...> class VT>
-VT<T> maxw(const VT<T>& arr, uint32_t w) {
+decayed_t<VT,T> maxw(uint32_t w, const VT<T>& arr) {
-	const int& len = arr.size;
+	const uint32_t& len = arr.size;
-	VT<T> ret(len);
+	decayed_t<VT, T> ret(len);
 	std::deque<std::pair<T, uint32_t>> cache;
 	for (int i = 0; i < len; ++i) {
 		if (!cache.empty() && cache.front().second == i - w) cache.pop_front();
@@ -92,14 +92,66 @@ VT<T> maxw(const VT<T>& arr, uint32_t w) {
 	return ret;
 }
 
+template<class T, template<typename ...> class VT>
+decayed_t<VT, types::GetLongType<T>> sums(const VT<T>& arr) {
+	const uint32_t& len = arr.size;
+	decayed_t<VT, types::GetLongType<T>> ret(len);
+	uint32_t i = 0;
+	if(len) ret[i++] = arr[0];
+	for (; i < len; ++i) 
+		ret[i] = ret[i-1] + arr[i];
+	return ret;
+}
+template<class T, template<typename ...> class VT>
+decayed_t<VT, types::GetFPType<T>> avgs(const VT<T>& arr) {
+	const uint32_t& len = arr.size;
+	typedef types::GetFPType<T> FPType;
+	decayed_t<VT, FPType> ret(len);
+	uint32_t i = 0;
+	types::GetLongType<T> s;
+	if(len) s = ret[i++] = arr[0];
+	for (; i < len; ++i) 
+		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;
+	decayed_t<VT, types::GetLongType<T>> ret(len);
+	uint32_t i = 0;
+	w = w > len ? len : w;
+	if(len) ret[i++] = arr[0];
+	for (; i < w; ++i) 
+		ret[i] = ret[i-1] + arr[i];
+	for (; i < len; ++i) 
+		ret[i] = ret[i-1] + arr[i] - arr[i-w];
+	return ret;
+}
+template<class T, template<typename ...> class VT>
+decayed_t<VT, types::GetFPType<T>> avgw(uint32_t w, const VT<T>& arr) {
+	typedef types::GetFPType<T> FPType;
+	const uint32_t& len = arr.size;
+	decayed_t<VT, FPType> ret(len);
+	uint32_t i = 0;
+	types::GetLongType<T> s;
+	w = w > len ? len : w;
+	if(len)	s = ret[i++] = arr[0];
+	for (; i < w; ++i) 
+		ret[i] = (s += arr[i])/(FPType)(i+1);
+	for (; i < len; ++i) 
+		ret[i] = ret[i-1] + (arr[i] - arr[i-w])/(FPType)w;
+	return ret;
+}
+
+template <class T> constexpr inline T count(const T& v) { return 1; }
 template <class T> constexpr inline T max(const T& v) { return v; }
 template <class T> constexpr inline T min(const T& v) { return v; }
 template <class T> constexpr inline T avg(const T& v) { return v; }
 template <class T> constexpr inline T sum(const T& v) { return v; }
-template <class T> constexpr inline T maxw(const T& v, uint32_t) { return v; }
+template <class T> constexpr inline T maxw(uint32_t, const T& v) { return v; }
-template <class T> constexpr inline T minw(const T& v, uint32_t) { return v; }
+template <class T> constexpr inline T minw(uint32_t, const T& v) { return v; }
-template <class T> constexpr inline T avgw(const T& v, uint32_t) { return v; }
+template <class T> constexpr inline T avgw(uint32_t, const T& v) { return v; }
-template <class T> constexpr inline T sumw(const T& v, uint32_t) { return v; }
+template <class T> constexpr inline T sumw(uint32_t, const T& v) { return v; }
 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; }

server/io.h

@@ -0,0 +1,15 @@
+#pragma once
+#include "types.h"
+#include <cstdio>
+#include <string>
+template <class ...Types>
+std::string generate_printf_string(const char* sep = " ", const char* end = "\n") {
+	std::string str;
+	((str += types::printf_str[types::Types<value_type_r<Types>>::getType()], str += sep), ...);
+	const auto trim = str.size() - strlen(sep);
+	if (trim > 0)
+		str.resize(trim);
+	str += end;
+	return str;
+}
+

server/priority_vector.hpp

@@ -0,0 +1,19 @@
+#pragma once
+#include "vector_type.hpp"
+#include <algorithm>
+#include <stdint.h>
+template <class Comparator, typename T = uint32_t>
+class priority_vector : public vector_type<T> {
+	const Comparator comp;
+public:
+	priority_vector(Comparator comp = std::less<T>{}) : 
+		comp(comp), vector_type<T>(0) {}
+	void emplace_back(T val) {
+		vector_type<T>::emplace_back(val);
+		std::push_heap(container, container + size, comp);
+	}
+	void pop_back() {
+		std::pop_heap(container, container + size, comp);
+		--size;
+	}
+}; 

server/server.cpp

@@ -75,6 +75,7 @@ int main(int argc, char** argv) {
     shm.FreeMemoryMap();
     return 0;
 }
+#include "utils.h"
 int _main()
 {
 
@@ -83,6 +84,7 @@ int _main()
     //t.emplace_back(2);
     //print(t);
     //return 0;
+    puts(cpp_17 ?"true":"false");
     void* handle = dlopen("dll.so", RTLD_LAZY);
     printf("handle: %x\n", handle);
     Context* cxt = new Context();
@@ -96,7 +98,8 @@ int _main()
         }
         dlclose(handle);
     }
-
+    //static_assert(std::is_same_v<decltype(fill_integer_array<5, 1>()), std::integer_sequence<bool, 1,1,1,1,1>>, "");
     return 0;
+    std::unordered_map<int, int> a;
 }
 

server/server.sln

@@ -8,32 +8,50 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "server", "server.vcxproj",
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81} = {8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}
 	EndProjectSection
 EndProject
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "Project1", "..\Project1\Project1.vcxproj", "{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}"
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "msc-plugin", "..\msc-plugin\msc-plugin.vcxproj", "{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}"
+EndProject
+Project("{888888A0-9F3D-457C-B088-3A5042F75D52}") = "msvs-py", "..\msvs-py\msvs-py.pyproj", "{CCC243F5-663E-45B7-A6DE-B2468C58B3A7}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
 		Debug|x64 = Debug|x64
 		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
 		Release|x64 = Release|x64
 		Release|x86 = Release|x86
 	EndGlobalSection
 	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Debug|Any CPU.ActiveCfg = Debug|x64
+		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Debug|Any CPU.Build.0 = Debug|x64
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Debug|x64.ActiveCfg = Debug|x64
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Debug|x64.Build.0 = Debug|x64
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Debug|x86.ActiveCfg = Debug|Win32
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Debug|x86.Build.0 = Debug|Win32
+		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Release|Any CPU.ActiveCfg = Release|x64
+		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Release|Any CPU.Build.0 = Release|x64
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Release|x64.ActiveCfg = Release|x64
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Release|x64.Build.0 = Release|x64
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Release|x86.ActiveCfg = Release|Win32
 		{031352C2-AFBB-45AA-9518-DBC1F9EF2AF3}.Release|x86.Build.0 = Release|Win32
+		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Debug|Any CPU.ActiveCfg = Debug|x64
+		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Debug|Any CPU.Build.0 = Debug|x64
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Debug|x64.ActiveCfg = Debug|x64
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Debug|x64.Build.0 = Debug|x64
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Debug|x86.ActiveCfg = Debug|Win32
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Debug|x86.Build.0 = Debug|Win32
+		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Release|Any CPU.ActiveCfg = Release|x64
+		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Release|Any CPU.Build.0 = Release|x64
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Release|x64.ActiveCfg = Release|x64
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Release|x64.Build.0 = Release|x64
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Release|x86.ActiveCfg = Release|Win32
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}.Release|x86.Build.0 = Release|Win32
+		{CCC243F5-663E-45B7-A6DE-B2468C58B3A7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{CCC243F5-663E-45B7-A6DE-B2468C58B3A7}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{CCC243F5-663E-45B7-A6DE-B2468C58B3A7}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{CCC243F5-663E-45B7-A6DE-B2468C58B3A7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{CCC243F5-663E-45B7-A6DE-B2468C58B3A7}.Release|x64.ActiveCfg = Release|Any CPU
+		{CCC243F5-663E-45B7-A6DE-B2468C58B3A7}.Release|x86.ActiveCfg = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

server/server.vcxproj

@@ -23,32 +23,32 @@
     <Keyword>Win32Proj</Keyword>
     <ProjectGuid>{031352c2-afbb-45aa-9518-dbc1f9ef2af3}</ProjectGuid>
     <RootNamespace>server</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
+    <WindowsTargetPlatformVersion>10.0.19041.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v143</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|Win32'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v143</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>true</UseDebugLibraries>
-    <PlatformToolset>v143</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'" Label="Configuration">
     <ConfigurationType>Application</ConfigurationType>
     <UseDebugLibraries>false</UseDebugLibraries>
-    <PlatformToolset>v143</PlatformToolset>
+    <PlatformToolset>v141</PlatformToolset>
     <WholeProgramOptimization>true</WholeProgramOptimization>
     <CharacterSet>Unicode</CharacterSet>
   </PropertyGroup>
@@ -88,9 +88,9 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp20</LanguageStandard>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -105,9 +105,9 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp20</LanguageStandard>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -122,9 +122,9 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp20</LanguageStandard>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -139,9 +139,9 @@
       <SDLCheck>true</SDLCheck>
       <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
-      <LanguageStandard>stdcpp20</LanguageStandard>
       <MultiProcessorCompilation>true</MultiProcessorCompilation>
       <EnableParallelCodeGeneration>true</EnableParallelCodeGeneration>
+      <LanguageStandard>stdcpplatest</LanguageStandard>
     </ClCompile>
     <Link>
       <SubSystem>Console</SubSystem>
@@ -167,7 +167,9 @@
     <ClInclude Include="aggregations.h" />
     <ClInclude Include="gc.hpp" />
     <ClInclude Include="hasher.h" />
+    <ClInclude Include="io.h" />
     <ClInclude Include="libaquery.h" />
+    <ClInclude Include="priority_vector.hpp" />
     <ClInclude Include="table.h" />
     <ClInclude Include="types.h" />
     <ClInclude Include="utils.h" />
@@ -175,10 +177,4 @@
     <ClInclude Include="winhelper.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
-  <ImportGroup Label="ExtensionTargets" />
-  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
-    <PropertyGroup>
-      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
-    </PropertyGroup>
-  </Target>
 </Project>

server/table.h

@@ -1,9 +1,13 @@
+// TODO: Replace `cout, printf` with sprintf&fputs and custom buffers
+
 #ifndef _TABLE_H
 #define _TABLE_H
 
 #include "types.h"
 #include "vector_type.hpp"
 #include <iostream>
+#include <string>
+#include "io.h"
 template <typename T>
 class vector_type;
 template <>
@@ -24,8 +28,10 @@ template<typename _Ty>
 class ColRef : public vector_type<_Ty>
 {
 public:
+	typedef ColRef<_Ty> Decayed_t;
 	const char* name;
 	types::Type_t ty = types::ERROR;
+	ColRef() : vector_type<_Ty>(0), name("") {}
 	ColRef(const uint32_t& size, const char* name = "") : vector_type<_Ty>(size), name(name) {}
 	ColRef(const char* name) : name(name) {}
 	void init() { ty = types::Types<_Ty>::getType();  this->size = this->capacity = 0; this->container = 0; }
@@ -35,6 +41,14 @@ public:
 	ColView<_Ty> operator [](const vector_type<uint32_t>&idxs) const {
 		return ColView<_Ty>(*this, idxs);
 	}
+
+	void out(uint32_t n = 4, const char* sep = " ") const {
+		n = n > this->size ? this->size : n;
+		std::cout << '(';
+			for (uint32_t i = 0; i < n; ++i)
+				std::cout << this->operator[](i) << sep;
+		std::cout << ')';
+	}
 	template<typename T>
 	ColRef<T> scast();
 };
@@ -42,6 +56,7 @@ public:
 template<typename _Ty>
 class ColView {
 public: 
+	typedef ColRef<_Ty> Decayed_t;
 	const vector_type<uint32_t>& idxs;
 	const ColRef<_Ty>& orig;
 	const uint32_t& size;
@@ -75,8 +90,22 @@ public:
 	Iterator_t end() const {
 		return Iterator_t(idxs.end(), orig);
 	}
+	void out(uint32_t n = 4, const char* sep = " ") const {
+		n = n > size ? size : n;
+		std::cout<<'(';
+		for (uint32_t i = 0; i < n; ++i) 
+			std::cout << this->operator[](i)<< sep;
+		std::cout << ')';
+	}
 };
-
+template <template <class...> class VT, class T>
+std::ostream& operator<<(std::ostream& os, const VT<T>& v)
+{
+	v.out();
+	return os;
+}
+template <class Type>
+struct decayed_impl<ColView, Type> { typedef ColRef<Type> type; };
 template<typename _Ty>
 template<typename T>
 inline ColRef<T> ColRef<_Ty>::scast()
@@ -85,13 +114,62 @@ inline ColRef<T> ColRef<_Ty>::scast()
 	return *(ColRef<T> *)this;
 }
 using uColRef = ColRef<void>;
+
+template<class ...Types> struct TableInfo;
+template<class ...Types> struct TableView;
+
+template <long long _Index, bool order = true, class... _Types>
+constexpr inline auto& get(const TableInfo<_Types...>& table) noexcept {
+	if constexpr (order)
+		return *(ColRef<std::tuple_element_t<_Index, std::tuple<_Types...>>> *) & (table.colrefs[_Index]);
+	else 
+		return *(ColRef<std::tuple_element_t<-1-_Index, std::tuple<_Types...>>> *) & (table.colrefs[-1-_Index]);
+}
+
+template <long long _Index, class... _Types>
+constexpr inline ColRef<std::tuple_element_t<_Index, std::tuple<_Types...>>>& get(const TableView<_Types...>& table) noexcept {
+	return *(ColRef<std::tuple_element_t<_Index, std::tuple<_Types...>>> *) & (table.info.colrefs[_Index]);
+}
+
+template <class V>
+struct is_vector_impl<ColRef<V>> : std::true_type {};
+template <class V>
+struct is_vector_impl<ColView<V>> : std::true_type {};
+template <class V>
+struct is_vector_impl<vector_type<V>> : std::true_type {};
+
+template<class ...Types>
+struct TableView;
 template<class ...Types>
 struct TableInfo {
 	const char* name;
 	ColRef<void>* colrefs;
 	uint32_t n_cols;
-	void print(const char* __restrict sep, const char* __restrict end) const;
 	typedef std::tuple<Types...> tuple_type;
+	void print(const char* __restrict sep, const char* __restrict end) const;
+
+	template <class ...Types2>
+	struct lineage_t {
+		TableInfo<Types...>* this_table;
+		TableInfo<Types2...>* table;
+		vector_type<uint32_t> rid;
+		constexpr lineage_t(TableInfo<Types...>*this_table, TableInfo<Types2...> *table) 
+			: this_table(this_table), table(table), rid(0) {}
+		constexpr lineage_t() : this_table(0), table(0), rid(0) {}
+
+		template <int col>
+		inline auto& get(uint32_t idx) {
+			return get<col>(*table)[rid[idx]];
+		}
+		void emplace_back(const uint32_t& v) {
+			rid.emplace_back(v);
+		}
+	};
+	template<class ...Types2>
+	auto bind(TableInfo<Types2...>* table2) {
+		return lineage_t(this, table2);
+	}
+	
 	template <size_t j = 0>
 	typename std::enable_if<j == sizeof...(Types) - 1, void>::type print_impl(const uint32_t& i, const char* __restrict sep = " ") const;
 	template <size_t j = 0>
@@ -103,12 +181,106 @@ struct TableInfo {
 	template <size_t ...Idxs>
 	using getRecordType = typename GetTypes<Idxs...>::type;
 	TableInfo(const char* name, uint32_t n_cols);
+	template <int prog = 0>
+	inline void materialize(const vector_type<uint32_t>& idxs, TableInfo<Types...>* tbl = nullptr) { // inplace materialize
+		if constexpr(prog == 0) tbl = (tbl == 0 ? this : tbl);
+		if constexpr (prog == sizeof...(Types)) return;
+		else {
+			auto& col = get<prog>(*this);
+			auto new_col = decays<decltype(col)>{idxs.size};
+			for(uint32_t i = 0; i < idxs.size; ++i)
+				new_col[i] = col[idxs[i]];
+			get<prog>(*tbl) = new_col;
+			materialize<prog + 1>(idxs, tbl);
+		}
+	}
+	inline TableInfo<Types...>* materialize_copy(const vector_type<uint32_t>& idxs) { 
+		auto tbl = new TableInfo<Types...>(this->name, sizeof...(Types));
+		materialize<0>(idxs, tbl);
+		return tbl;
+	}
+	template<int ...cols>
+	inline vector_type<uint32_t>* order_by(vector_type<uint32_t>* ord = nullptr) {
+		if (!ord) {
+			ord = new vector_type<uint32_t>(colrefs[0].size);
+			for (uint32_t i = 0; i < colrefs[0].size; ++i)
+				(*ord)[i] = i;
+		}
+		std::sort(ord->begin(), ord->end(), [this](const uint32_t& lhs, const uint32_t& rhs) {
+			return
+				std::forward_as_tuple((cols >= 0 ? get<cols, (cols >= 0)>(*this)[lhs] : -get<cols, (cols >= 0)>(*this)[lhs]) ...)
+				<
+				std::forward_as_tuple((cols >= 0 ? get<cols, (cols >= 0)>(*this)[rhs] : -get<cols, (cols >= 0)>(*this)[rhs]) ...);
+			});
+		return ord;
+	}
+	template <int ...cols>
+	auto order_by_view () {
+		return TableView<Types...>(order_by<cols...>(), *this);
+	}
+
+	// Print 2 -- generate printf string first, supports flattening, supports sprintf/printf/fprintf
+	template <int col, int ...rem_cols, class Fn, class ...__Types> 
+	inline void print2_impl(Fn func, const uint32_t& i, const __Types& ... args) const {
+		using this_type = typename std::tuple_element<col, tuple_type>::type;
+		const auto& this_value = get<col>(*this)[i];
+		const auto& next = [&](auto &v) {
+			if constexpr (sizeof...(rem_cols) == 0)
+				func(args..., v);
+			else
+				print2_impl<rem_cols...>(func, i, args ..., v);
+		};
+		if constexpr (is_vector_type<this_type>)
+			for (int j = 0; j < this_value.size; ++j)
+				next(this_value[j]);
+		else
+			next(this_value);
+	}
+	template <int ...cols>
+	void print2(const char* __restrict sep = ",", const char* __restrict end = "\n",
+		const vector_type<uint32_t>* __restrict view = nullptr, FILE* __restrict fp = nullptr) const {
+		std::string printf_string =
+			generate_printf_string<typename std::tuple_element<cols, tuple_type>::type ...>(sep, end);
+		const auto& prt_loop = [&fp, &view, &printf_string, *this](const auto& f) {
+			if(view)
+				for (int i = 0; i < view->size; ++i)
+					print2_impl<cols...>(f, (*view)[i], printf_string.c_str());
+			else
+				for (int i = 0; i < colrefs[0].size; ++i)
+					print2_impl<cols...>(f, i, printf_string.c_str());
+		};
+		if (fp)
+			prt_loop([&fp](auto... args) { fprintf(fp, args...); });
+		else
+			prt_loop(printf);
+	}
+	template <int ...vals> struct applier {
+	inline constexpr static void apply(const TableInfo<Types...>& t, const char* __restrict sep = ",", const char* __restrict end = "\n",
+		const vector_type<uint32_t>* __restrict view = nullptr, FILE* __restrict fp = nullptr)
+	{ t.template print2<vals ...>(sep, end, view, fp); }};
+	
+	inline void printall(const char* __restrict sep = ",", const char* __restrict end = "\n",
+		const vector_type<uint32_t>* __restrict view = nullptr, FILE* __restrict fp = nullptr) {
+		applyIntegerSequence<sizeof...(Types), applier>::apply(*this, sep, end, view, fp);
+	}
 };
 
-template <size_t _Index, class... _Types>
+
-constexpr inline ColRef<std::tuple_element_t<_Index, std::tuple<_Types...>>>& get(const TableInfo<_Types...>& table) noexcept {
+template<class ...Types>
-	return *(ColRef<std::tuple_element_t<_Index, std::tuple<_Types...>>> *) & (table.colrefs[_Index]);
+struct TableView {
-}
+	const vector_type<uint32_t>* idxs;
+	const TableInfo<Types...>& info;
+	constexpr TableView(const vector_type<uint32_t>* idxs, const TableInfo<Types...>& info) noexcept : idxs(idxs), info(info) {}
+	void print(const char* __restrict sep, const char* __restrict end) const;
+	template <size_t j = 0>
+	typename std::enable_if<j == sizeof...(Types) - 1, void>::type print_impl(const uint32_t& i, const char* __restrict sep = " ") const;
+	template <size_t j = 0>
+	typename std::enable_if < j < sizeof...(Types) - 1, void>::type print_impl(const uint32_t& i, const char* __restrict sep = " ") const;
+	
+	~TableView() {
+		delete idxs;
+	}
+};
 
 template <class T>
 constexpr static inline bool is_vector(const ColRef<T>&) {
@@ -118,15 +290,37 @@ template <class T>
 constexpr static inline bool is_vector(const vector_type<T>&) {
 	return true;
 }
-template <class T>
+
-constexpr static inline bool is_vector(const T&) {
-	return false;
-}
 template<class ...Types>
 TableInfo<Types...>::TableInfo(const char* name, uint32_t n_cols) : name(name), n_cols(n_cols) {
 	this->colrefs = (ColRef<void>*)malloc(sizeof(ColRef<void>) * n_cols);
 }
+template <class ...Types>
+template <size_t j>
+inline typename std::enable_if<j == sizeof...(Types) - 1, void>::type
+TableView<Types ...>::print_impl(const uint32_t& i, const char* __restrict sep) const {
+	std::cout << (get<j>(*this))[(*idxs)[i]];
+}
 
+template<class ...Types>
+template<size_t j>
+inline typename std::enable_if < j < sizeof...(Types) - 1, void>::type
+	TableView<Types...>::print_impl(const uint32_t& i, const char* __restrict sep) const
+{
+	std::cout << (get<j>(*this))[(*idxs)[i]] << sep;
+	print_impl<j + 1>(i, sep);
+}
+
+template<class ...Types>
+inline void TableView<Types...>::print(const char* __restrict sep, const char* __restrict end) const {
+	int n_rows = 0;
+	if (info.colrefs[0].size > 0)
+		n_rows = info.colrefs[0].size;
+	for (int i = 0; i < n_rows; ++i) {
+		print_impl(i);
+		std::cout << end;
+	}
+}
 template <class ...Types>
 template <size_t j>
 inline typename std::enable_if<j == sizeof...(Types) - 1, void>::type
@@ -153,60 +347,60 @@ inline void TableInfo<Types...>::print(const char* __restrict sep, const char* _
 		std::cout << end;
 	}
 }
-template <class T1, class T2, template<typename ...> class VT>
+template <class T1, class T2, template<typename ...> class VT, template<typename ...> class VT2>
-VT<typename types::Coercion<T1, T2>::type> operator -(const VT<T1>& lhs, const VT<T2>& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator -(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] - rhs.container[i];
+		ret[i] = lhs[i] - rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-VT<typename types::Coercion<T1, T2>::type> operator -(const VT<T1>& lhs, const T2& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator -(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] - 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, template<typename ...> class VT2>
-VT<typename types::Coercion<T1, T2>::type> operator +(const VT<T1>& lhs, const VT<T2>& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator +(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] + rhs.container[i];
+		ret[i] = lhs[i] + rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-VT<typename types::Coercion<T1, T2>::type> operator +(const VT<T1>& lhs, const T2& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator +(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] + 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, template<typename ...> class VT2>
-VT<typename types::Coercion<T1, T2>::type> operator *(const VT<T1>& lhs, const VT<T2>& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator *(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] * rhs.container[i];
+		ret[i] = lhs[i] * rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-VT<typename types::Coercion<T1, T2>::type> operator *(const VT<T1>& lhs, const T2& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator *(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] * 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, template<typename ...> class VT2>
-VT<typename types::Coercion<T1, T2>::type> operator /(const VT<T1>& lhs, const VT<T2>& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator /(const VT<T1>& lhs, const VT2<T2>& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] / rhs.container[i];
+		ret[i] = lhs[i] / rhs[i];
 	return ret;
 }
 template <class T1, class T2, template<typename ...> class VT>
-VT<typename types::Coercion<T1, T2>::type> operator /(const VT<T1>& lhs, const T2& rhs) {
+decayed_t<VT, typename types::Coercion<T1, T2>::type> operator /(const VT<T1>& lhs, const T2& rhs) {
-	auto ret = VT<typename types::Coercion<T1, T2>::type>(lhs.size, "");
+	auto ret = decayed_t<VT, typename types::Coercion<T1, T2>::type>(lhs.size, "");
 	for (int i = 0; i < lhs.size; ++i)
-		ret.container[i] = lhs.container[i] / rhs;
+		ret[i] = lhs[i] / rhs;
 	return ret;
 }
 
@@ -214,17 +408,24 @@ template <class ...Types>
 void print(const TableInfo<Types...>& v, const char* delimiter = " ", const char* endline = "\n") {
 	v.print(delimiter, endline);
 }
+template <class ...Types>
+void print(const TableView<Types...>& v, const char* delimiter = " ", const char* endline = "\n") {
+	v.print(delimiter, endline);
+}
 template <class T>
 void print(const T& v, const char* delimiter = " ") {
-	printf(types::printf_str[types::Types<T>::getType()], v);
+	std::cout<< v;
+	// printf(types::printf_str[types::Types<T>::getType()], v);
 }
 template <class T>
 void inline print_impl(const T& v, const char* delimiter, const char* endline) {
 	for (const auto& vi : v) {
 		print(vi);
-		printf("%s", delimiter);
+		std::cout << delimiter;
+		// printf("%s", delimiter);
 	}
-	printf("%s", endline);
+	std::cout << endline;
+	//printf("%s", endline);
 }
 
 template <class T, template<typename> class VT>

server/types.cpp

@@ -1,11 +1,6 @@
 #include "types.h"
 #include <string>
 #include <iostream>
-//template<typename T>
-//inline static constexpr void types::Types<T>::print(T& v)
-//{
-//	std::cout << v;
-//}
 #include <chrono>
 #include <ctime>
 namespace types {

server/types.h

@@ -9,25 +9,33 @@
 #ifdef _MSC_VER
 #define __restrict__ __restrict
 #endif
+
+template <class T>
+constexpr static inline bool is_vector(const T&) {
+	return false;
+}
+template <class T>
+struct is_vector_impl : std::false_type {};
+template <class T>
+constexpr static bool is_vector_type = is_vector_impl<T>::value;
+
 namespace types {
 	enum Type_t {
 		AINT, AFLOAT, ASTR, ADOUBLE, ALDOUBLE, ALONG, ASHORT, ADATE, ATIME, ACHAR,
-		AUINT, AULONG, AUSHORT, AUCHAR, NONE, ERROR
+		AUINT, AULONG, AUSHORT, AUCHAR, VECTOR, NONE, ERROR
 	};
-	static constexpr const char* printf_str[] = { "%d ", "%f ", "%s ", "%lf ", "%llf ", "%ld ", "%hi ", "%s ", "%s ", "%c ",
+	static constexpr const char* printf_str[] = { "%d", "%f", "%s", "%lf", "%llf", "%ld", "%hi", "%s", "%s", "%c",
-		"%u ", "%lu ", "%hu ", "%hhu ", "NULL " };
+		"%u", "%lu", "%hu", "%hhu", "Vector<%s>", "NULL", "ERROR" };
 	// TODO: deal with data/time <=> str/uint conversion
 	struct date_t {
 		uint32_t val;
 		date_t(const char* d) {
-
 		}
 		std::string toString() const;
 	};
 	struct time_t {
 		uint32_t val;
 		time_t(const char* d) {
-
 		}
 		std::string toString() const;
 	};
@@ -51,12 +59,14 @@ namespace types {
 		f(unsigned short, AUSHORT) \
 		f(unsigned char, AUCHAR) 
 
-		constexpr static Type_t getType() {
+		inline constexpr static Type_t getType() {
-#define	TypeConnect(x, y) if(typeid(T) == typeid(x)) return y; else
+#define	TypeConnect(x, y) if constexpr(std::is_same<x, T>::value) return y; else
 			ConnectTypes(TypeConnect)
+			if constexpr (is_vector_type<T>) 
+				return VECTOR;
+			else
 				return NONE;
 		}
-		//static constexpr inline void print(T& v);
 	};
 #define ATypeSize(t, at) sizeof(t),
 	static constexpr size_t AType_sizes[] = { ConnectTypes(ATypeSize) 1 };
@@ -77,13 +87,13 @@ namespace types {
 		using type = Cond(__Eq(float), float, Cond(__Eq(double), double, long double));
 	};
 	template<class T>
-	using GetFPType = typename GetFPTypeImpl<T>::type;
+	using GetFPType = typename GetFPTypeImpl<typename std::decay<T>::type>::type;
 	template<class T>
 	struct GetLongTypeImpl {
 		using type = Cond(_U(T), unsigned long long, Cond(Fp(T), long double, long long));
 	};
 	template<class T>
-	using GetLongType = typename GetLongTypeImpl<T>::type;
+	using GetLongType = typename GetLongTypeImpl<typename std::decay<T>::type>::type;
 }
 
 #define getT(i, t) std::tuple_element_t<i, std::tuple<t...>>
@@ -118,6 +128,65 @@ struct decayS <T<Types...>>{
 	using type = T<typename std::decay<Types>::type ...>;
 };
 template <class T>
-using decays = typename decayS<T>::type;
+using decays = typename decayS<typename std::decay<T>::type>::type;
+template <class T>
+using decay_inner = typename decayS<T>::type;
+
+template <class, template <class...> class T>
+struct instance_of_impl : std::false_type {};
+template <class ...T1, template <class ...> class T2>
+struct instance_of_impl<T2<T1...>, T2> : std::true_type {};
+
+template <class T1, class T2>
+struct same_class_impl : std::false_type {};
+template <class ...T1s, class ...T2s, template <class...> class T1>
+struct same_class_impl<T1<T1s...>, T1<T2s...>> : std::true_type {};
+
+template <class T1, class T2>
+bool same_class = same_class_impl<T1, T2>::value;
+template <class T1, template <class...> class T2>
+bool instance_of = instance_of_impl<T1, T2>::value;
 
+template <class lT, template <typename ...> class rT>
+using transTypes = typename transTypes_s<lT, rT>::type;
+
+template <class lT, class vT, template <vT ...> class rT>
+struct transValues_s;
+template <class vT, template<class, vT ...> class lT, vT ...T, template<vT ...> class rT>
+struct transValues_s<lT<vT, T...>, vT, rT> {
+	using type = rT<T...>;
+};
+
+#include <utility>
+template <class vT, int i, template <vT ...> class rT>
+using transValues = typename transValues_s<std::make_integer_sequence<vT, i>, vT, rT>::type;
+template <int i, template <int ...> class rT>
+using applyIntegerSequence = typename transValues_s<std::make_integer_sequence<int, i>, int, rT>::type;
+template <template <class ...> class T, class ...Types>
+struct decayed_impl{ typedef T<Types...> type;};
+template <template <typename ...> class VT, class ...Types>
+using decayed_t = typename decayed_impl<VT, Types...>::type;
+
+template <class First = void, class...Rest>
+struct get_first_impl {
+	typedef First first;
+	constexpr static size_t rest_len = sizeof...(Rest);
+	typedef get_first_impl<Rest...> rest;
+};
+template <class ...T>
+using get_first = typename get_first_impl<T...>::first;
+template <class T>
+struct value_type_impl { typedef T type; };
+template <template <class...> class VT, class ...V>
+struct value_type_impl<VT<V...>> { typedef get_first<V...> type; };
+template <class T>
+using value_type = typename value_type_impl<T>::type;
+template <class ...T>
+using get_first = typename get_first_impl<T...>::first;
+template <class T>
+struct value_type_rec_impl { typedef T type; };
+template <template <class...> class VT, class ...V>
+struct value_type_rec_impl<VT<V...>> { typedef typename value_type_rec_impl<get_first<int>>::type type; };
+template <class T>
+using value_type_r = typename value_type_rec_impl<T>::type;
 #endif // !_TYPES_H

server/utils.h

@@ -1,18 +1,16 @@
 #pragma once
 #include <string>
 #include <ctime>
-
+#if ((defined(_MSVC_LANG) && _MSVC_LANG >= 201703L) || __cplusplus >= 201703L)
-template<int cnt, int begin = 0, int interval = 1>
+constexpr static bool cpp_17 = true;
-struct const_range {
+#else
-	int arr[cnt];
+constexpr static bool cpp_17 = false;
-	constexpr const_range() {
+#endif
-		for (int i = begin, n = 0; n < cnt; ++n, i += interval)
+template <class T>
-			arr[n] = i;
+inline const char* str(const T& v) {
-	}
+	return "";
-	const int* begin() const {
+}
-		return arr;
+template <>
-	}
+inline const char* str(const bool& v) {
-	const int* end() const {
+	return v ? "true" : "false";
-		return arr + cnt;
+}
-	}
-};

server/vector_type.cpp

@@ -1 +1,11 @@
 #include "vector_type.hpp"
+#include <iostream>
+template<typename _Ty>
+inline void vector_type<_Ty>::out(uint32_t n, const char* sep) const
+{
+	n = n > size ? size : n;
+	std::cout << '(';
+		for (uint32_t i = 0; i < n; ++i)
+			std::cout << this->operator[](i) << sep;
+	std::cout << ')';
+}

server/vector_type.hpp

@@ -22,7 +22,11 @@
 template <typename _Ty>
 class vector_type {
 public:
-	void inline _copy(vector_type<_Ty>& vt) {
+	typedef vector_type<_Ty> Decayed_t;
+	void inline _copy(const vector_type<_Ty>& vt) {
+		// quick init while using malloc
+		//if (capacity > 0) free(container);
+		
 		this->size = vt.size;
 		this->capacity = vt.capacity;
 		this->container = (_Ty*)malloc(size * sizeof(_Ty));
@@ -30,6 +34,8 @@ public:
 		memcpy(container, vt.container, sizeof(_Ty) * size);
 	}
 	void inline _move(vector_type<_Ty>&& vt) {
+		if (capacity > 0) free(container);
+		
 		this->size = vt.size;
 		this->capacity = vt.capacity;
 		this->container = vt.container;
@@ -52,10 +58,10 @@ public:
 		}
 	}
 	constexpr vector_type() noexcept : size(0), capacity(0), container(0) {};
-	constexpr vector_type(vector_type<_Ty>& vt) noexcept {
+	constexpr vector_type(const vector_type<_Ty>& vt) noexcept : capacity(0) {
 		_copy(vt);
 	}
-	constexpr vector_type(vector_type<_Ty>&& vt) noexcept {
+	constexpr vector_type(vector_type<_Ty>&& vt) noexcept : capacity(0) {
 		_move(std::move(vt));
 	}
 	vector_type<_Ty> operator =(const _Ty& vt) {
@@ -67,7 +73,7 @@ public:
 		container[0] = vt;
 		return *this;
 	}
-	vector_type<_Ty> operator =(vector_type<_Ty>& vt) {
+	vector_type<_Ty> operator =(const vector_type<_Ty>& vt) {
 		_copy(vt);
 		return *this;
 	}
@@ -75,6 +81,18 @@ public:
 		_move(std::move(vt));
 		return *this;
 	}
+	template <template <class> class VT>
+	vector_type<_Ty> operator =(const VT<_Ty>& vt) {
+		if (capacity > 0) free(container);
+		container = static_cast<_Ty*>(malloc(size * sizeof(_Ty)));
+		
+		size = vt.size;
+		capacity = size;
+		for(uint32_t i = 0; i < size; ++i)
+			container[i] = vt[i];
+		
+		return *this;
+	}
 	void emplace_back(_Ty _val) {
 		if (size >= capacity) { // geometric growth
 			capacity += 1 + (capacity >> 1);
@@ -177,6 +195,7 @@ public:
 		}
 		size = this->size + dist;
 	}
+	void out(uint32_t n = 4, const char* sep = " ") const;
 	~vector_type() {
 		if (capacity > 0) free(container);
 		container = 0; size = capacity = 0;
@@ -248,7 +267,7 @@ public:
 		}
 	}
 	constexpr vector_type() : size(0), capacity(0), container(0) {};
-	void *get(uint32_t i, types::Type_t atype){
+	void* get(uint32_t i, types::Type_t atype){
 		return static_cast<void*>(static_cast<char*>(container) + (i * types::AType_sizes[atype]));
 	}
 	void operator[](const uint32_t& i) {

stock.a

@@ -17,16 +17,16 @@ INSERT INTO stocks VALUES(14,5)
 INSERT INTO stocks VALUES(15,2)
 INSERT INTO stocks VALUES(16,5)
 
+/*<k> "q1" </k>*/
 SELECT max(price-min(timestamp)) FROM stocks
 
-/*<k> "q1" </k>
+/*<k> "q2" </k>*/
-*/
 SELECT max(price-mins(price)) FROM stocks
-/*
+
-<k> "q2" </k>
+/*<k> "q3"</k>*/
-SELECT price, timestamp FROM stocks where price -timestamp > 1 and not (price*timestamp<100);
+SELECT price, timestamp FROM stocks where price - timestamp > 1 and not (price*timestamp<100)
-<k> "q3"</k>
+
+/*<k> "q4"</k>*/
 SELECT max(price-mins(price))
 FROM stocks
-     ASSUMING ASC timestamp
+     ASSUMING DESC timestamp
-*/