trigger demo

Makefile

@@ -5,7 +5,7 @@ Defines =
 CC = $(CXX) -xc 
 CXXFLAGS = --std=c++2a
 ifeq ($(AQ_DEBUG), 1)
-	OPTFLAGS = -g3 #-fsanitize=address 
+	OPTFLAGS = -g3 #-static-libasan -fsanitize=address 
 	LINKFLAGS = 
 else
 	OPTFLAGS = -Ofast -DNDEBUG -fno-stack-protector 

demo/Makefile

@@ -0,0 +1,9 @@
+all:
+	$(CXX) -include ../server/pch.hpp putdata.cpp ../libaquery.a -shared -fPIC --std=c++2a -Ofast -DNDEBUG -fno-stack-protector  -march=native  -DTHREADING -D__AQUERY_ITC_USE_SEMPH__  -I/usr/local/opt/monetdb/include/monetdb -flto -s -fno-semantic-interposition -L/usr/local/opt/monetdb/lib  -lmonetdbe -lmonetdbsql -lbat -o ../procedures/demoi0.so
+	$(CXX) -include ../server/pch.hpp action.cpp ../libaquery.a -shared -fPIC --std=c++2a -Ofast -DNDEBUG -fno-stack-protector  -march=native  -DTHREADING -D__AQUERY_ITC_USE_SEMPH__  -I/usr/local/opt/monetdb/include/monetdb -flto -s -fno-semantic-interposition -L/usr/local/opt/monetdb/lib  -lmonetdbe -lmonetdbsql -lbat -o ../procedures/democa0.so
+	$(CXX) -include ../server/pch.hpp query.cpp ../libaquery.a -shared -fPIC --std=c++2a -Ofast -DNDEBUG -fno-stack-protector  -march=native  -DTHREADING -D__AQUERY_ITC_USE_SEMPH__  -I/usr/local/opt/monetdb/include/monetdb -flto -s -fno-semantic-interposition -L/usr/local/opt/monetdb/lib  -lmonetdbe -lmonetdbsql -lbat -o ../procedures/democq0.so
+
+dbg:
+	$(CXX) -include ../server/pch.hpp putdata.cpp -g3 -march=native ../libaquery.a -shared -fPIC --std=c++2a -D_DEBUG -DTHREADING -D__AQUERY_ITC_USE_SEMPH__ -I/usr/local/opt/monetdb/include/monetdb -L/usr/local/opt/monetdb/lib -lmonetdbe -lmonetdbsql -lbat -o ../procedures/demoi0.so
+	$(CXX) -include ../server/pch.hpp action.cpp -g3 -march=native ../libaquery.a -shared -fPIC --std=c++2a -D_DEBUG -DTHREADING -D__AQUERY_ITC_USE_SEMPH__ -I/usr/local/opt/monetdb/include/monetdb -L/usr/local/opt/monetdb/lib -lmonetdbe -lmonetdbsql -lbat -o ../procedures/democa0.so
+	$(CXX) -include ../server/pch.hpp query.cpp -g3 -march=native ../libaquery.a -shared -fPIC --std=c++2a -D_DEBUG -DTHREADING -D__AQUERY_ITC_USE_SEMPH__ -I/usr/local/opt/monetdb/include/monetdb -L/usr/local/opt/monetdb/lib -lmonetdbe -lmonetdbsql -lbat -o ../procedures/democq0.so

demo/action.cpp

@@ -0,0 +1,30 @@
+#include "../server/libaquery.h"
+
+#ifndef __AQ_USE_THREADEDGC__
+
+#include "../server/gc.h"
+__AQEXPORT__(void) __AQ_Init_GC__(Context* cxt) {
+    GC::gc_handle = static_cast<GC*>(cxt->gc);
+    GC::scratch_space = nullptr;
+}
+
+#else // __AQ_USE_THREADEDGC__
+#define __AQ_Init_GC__(x)
+#endif // __AQ_USE_THREADEDGC__
+bool (*fit_inc)(vector_type<vector_type<double>> X, vector_type<int64_t> y) = nullptr;
+
+#include "../server/monetdb_conn.h"
+__AQEXPORT__(int) action(Context* cxt) {
+	using namespace std;
+	using namespace types;
+    if (fit_inc == nullptr)
+        fit_inc = (decltype(fit_inc))(cxt->get_module_function("fit_inc"));
+
+	auto server = static_cast<Server*>(cxt->alt_server);
+    auto len = uint32_t(monetdbe_get_size(*((void**)server->server), "source"));
+    auto x_1bN = ColRef<vector_type<double>>(len, monetdbe_get_col(*((void**)(server->server)), "source", 0));
+    auto y_6uX = ColRef<int64_t>(len, monetdbe_get_col(*((void**)(server->server)), "source", 1));
+    fit_inc(x_1bN, y_6uX);
+    puts("action done.");
+    return 0;
+}

demo/prep.a

@@ -0,0 +1,13 @@
+create table source(x vecdouble, y int64);
+LOAD MODULE FROM "./libirf.so"  FUNCTIONS (
+    newtree(height:int, f:int64, sparse:vecint, forget:double, maxf:int64, noclasses:int64, e:int) -> bool,
+    fit_inc(X:vecvecdouble, y:vecint64) -> bool,
+    predict(X:vecvecdouble) -> vecint  
+);
+
+create table elec_sparse(v int);    
+
+insert into elec_sparse values (0), (1), (1), (1), (1), (1), (1);
+
+select newtree(30, 7, elec_sparse.v, 0, 4, 2, 1) from elec_sparse
+

demo/putdata.cpp

@@ -0,0 +1,47 @@
+#include "../server/libaquery.h"
+
+#ifndef __AQ_USE_THREADEDGC__
+
+#include "../server/gc.h"
+__AQEXPORT__(void) __AQ_Init_GC__(Context* cxt) {
+    GC::gc_handle = static_cast<GC*>(cxt->gc);
+    GC::scratch_space = nullptr;
+}
+
+#else // __AQ_USE_THREADEDGC__
+#define __AQ_Init_GC__(x)
+#endif // __AQ_USE_THREADEDGC__
+#include "../server/monetdb_conn.h"
+#include "../csv.h"
+
+__AQEXPORT__(int) ld(Context* cxt) {
+	using namespace std;
+	using namespace types;
+	static int cnt = 0;
+	if (cnt > 700)
+		return 1;
+	else
+		++cnt;
+	char data_name[] = "data/electricity/electricity       ";
+	auto server = static_cast<Server*>(cxt->alt_server);
+	const char* names_fZrv[] = {"x", "y"};
+	auto tbl_6erF = new TableInfo<vector_type<double>,int64_t>("source", names_fZrv);
+	decltype(auto) c_31ju0e = tbl_6erF->get_col<0>();
+	decltype(auto) c_4VlzrR = tbl_6erF->get_col<1>();
+	c_31ju0e.init("x");
+	c_4VlzrR.init("y");
+	auto nxt = to_text(data_name + 28, cnt);
+	memcpy(nxt, ".csv", 5);
+	puts(data_name);
+	AQCSVReader<2, ',', ';'> csv_reader_7g0GY7(data_name);
+	csv_reader_7g0GY7.next_line();
+	vector_type<double> tmp_5XMNcBz5;
+	int64_t tmp_5dAHIJ1d;
+	while(csv_reader_7g0GY7.read_row(tmp_5XMNcBz5,tmp_5dAHIJ1d)) { 
+		c_31ju0e.emplace_back(tmp_5XMNcBz5);
+		c_4VlzrR.emplace_back(tmp_5dAHIJ1d);
+	}
+	tbl_6erF->monetdb_append_table(cxt->alt_server, "source");
+	return 0;
+}
+

demo/query.cpp

@@ -0,0 +1,30 @@
+#include "../server/libaquery.h"
+
+#ifndef __AQ_USE_THREADEDGC__
+
+#include "../server/gc.h"
+__AQEXPORT__(void) __AQ_Init_GC__(Context* cxt) {
+    GC::gc_handle = static_cast<GC*>(cxt->gc);
+    GC::scratch_space = nullptr;
+}
+
+#else // __AQ_USE_THREADEDGC__
+#define __AQ_Init_GC__(x)
+#endif // __AQ_USE_THREADEDGC__
+
+#include "../server/monetdb_conn.h"
+__AQEXPORT__(int) query(Context* cxt) {
+	using namespace std;
+	using namespace types;
+    auto server = static_cast<Server*>(cxt->alt_server);
+    static uint32_t old_sz = 0;
+    constexpr static uint32_t min_delta = 200;
+    auto newsz = monetdbe_get_size(*(void**) server->server, "source");
+    if (newsz > old_sz + min_delta) {
+        puts("query true.");
+        old_sz = uint32_t(newsz);
+        return 1;
+    }
+    puts("query false.");
+    return 0;
+}

demo/test.a

@@ -0,0 +1,3 @@
+create table test(x vecdouble, y int64);
+load complex data infile "data/electricity/electricity872.csv" into table test fields terminated by ',' element terminated by ';';
+select predict(x) from test

proctool.py

@@ -24,6 +24,7 @@ def write():
             fp.write(q.encode('utf-8'))
             if q.startswith('Q'):
                 fp.write(b'\n ')
+            
             fp.write(b'\x00')
         
 

reconstruct/ast.py

@@ -1118,6 +1118,11 @@ class create_trigger(ast_node):
             if self.procedure and self.table_name in self.context.tables_byname:
                 self.table = self.context.tables_byname[self.table_name]
                 self.table.triggers.add(self)
+                send_to_server(
+                    f'TC{self.trigger_name}\0{self.table_name}\0'
+                    f'{self.query_name}\0{self.action_name}'
+                )
+                
             else:
                 return
         self.context.triggers[self.trigger_name] = self
@@ -1131,7 +1136,7 @@ class create_trigger(ast_node):
 
     def execute(self): 
         from engine.utils import send_to_server
-        send_to_server(f'TC{self.query_name}\0{self.action_name}')
+        send_to_server(f'TA{self.query_name}\0{self.action_name}')
 
     def remove(self):
         from engine.utils import send_to_server

rfdata_preproc.py

@@ -3,7 +3,7 @@ import os
 sep = os.sep
 
 # toggles
-dataset = 'power' # [covtype, electricity, mixed, phishing, power]
+dataset = 'electricity' # [covtype, electricity, mixed, phishing, power]
 use_threadpool = False # True
 
 # environments

sdk/Evaluation.cpp

@@ -5,7 +5,7 @@
 
 struct minEval{
         double value;
-        int* values;
+        int* values = nullptr;
 
 	double eval;
         long left; // how many on its left

sdk/Makefile

@@ -1,11 +1,12 @@
 OPT_FLASG = 
-ifneq ($(DEBUG), 1)
+ifneq ($(AQ_DEBUG), 1)
 	OPT_FLAGS = -Ofast -march=native -flto -DNDEBUG 
 else 
-	OPT_FLAGS = -g3 -D_DEBUG -fsanitize=leak -fsanitize=address
+	OPT_FLAGS = -shared-libasan  -g3 -D_DEBUG  #-fsanitize=address
 endif
 example:
 	$(CXX) -shared -fPIC example.cpp aquery_mem.cpp -fno-semantic-interposition -Ofast -march=native -flto --std=c++1z -L.. -laquery -o ../test.so
 irf:
+	rm ../libirf.so ; \
 	$(CXX) -shared -fPIC RF.cpp irf.cpp incrementalDecisionTree.cpp aquery_mem.cpp Evaluation.cpp -fno-semantic-interposition $(OPT_FLAGS) --std=c++1z -o ../libirf.so
 all: example

sdk/aquery.h

@@ -28,20 +28,33 @@ struct Session{
     void* memory_map;
 };
 
+struct Trigger;
+struct IntervalBasedTriggerHost;
+struct CallbackBasedTriggerHost;
+
 struct Context {
     typedef int (*printf_type) (const char *format, ...);
-	void* module_function_maps = 0;
+
+	void* module_function_maps = nullptr;
 	Config* cfg;
 
 	int n_buffers, *sz_bufs;
 	void **buffers;
 
-	void* alt_server;
+	void* alt_server = nullptr;
 	Log_level log_level = LOG_INFO;
 
 	Session current;
-
+	const char* aquery_root_path;
-
+#ifdef THREADING
+	void* thread_pool;
+#endif	
+#ifndef __AQ_USE_THREADEDGC__
+	void* gc;
+#endif
+	printf_type print;
+	Context();
+	virtual ~Context();
 	template <class ...Types>
 	void log(Types... args) {
 		if (log_level == LOG_INFO)

sdk/incrementalDecisionTree.cpp

@@ -14,7 +14,7 @@ std::mt19937 g(rd());
 
 struct minEval{
 	double value;
-	int* values;
+	int* values = nullptr;
 
 	double eval;
 	long left; // how many on its left
@@ -825,7 +825,10 @@ void DecisionTree::IncrementalUpdate(double** data, long* result, long size, DT*
 		for(i=low;i<low+size;i++){
 			t[resultNew[i]]++;
 		}
-		if(cMin.values!=nullptr)free(cMin.values);
+		if(cMin.values!=nullptr){
+			free(cMin.values);
+			cMin.values = nullptr;
+		}
 		current->result = std::distance(t, std::max_element(t, t+classes));
 		free(index);
 		free(current->dataRecord);
@@ -989,13 +992,17 @@ void DecisionTree::Update(double** data, long* result, long size, DT* current){
 		}
 		if(c.eval<cMin.eval){
 			cMin.eval = c.eval;
-			if(cMin.values!=nullptr)free(cMin.values);
+			if(cMin.values!=nullptr){
+				free(cMin.values);
+				cMin.values = nullptr;
+			}
 			cMin.values = c.values;
 			cMin.value = c.value;
 			cFeature = col;
 			left = c.left;
 		}else if(c.values!=nullptr){
 			free(c.values);
+			c.values = nullptr;
 		}
 	}
 

sdk/irf.cpp

@@ -6,7 +6,10 @@
 
 #include "aquery.h"
 
-#include "./server/gc.h"
+#include "../server/gc.h"
+
+inline GC* GC::gc_handle = nullptr;
+inline ScratchSpace* GC::scratch_space = nullptr;
 __AQEXPORT__(void) __AQ_Init_GC__(Context* cxt) {
     GC::gc_handle = static_cast<GC*>(cxt->gc);
     GC::scratch_space = nullptr;
@@ -16,18 +19,18 @@ DecisionTree *dt = nullptr;
 RandomForest *rf = nullptr;
 
 __AQEXPORT__(bool)
-newtree(int height, long f, ColRef<int> X, double forget, long maxf, long noclasses, Evaluation e, long r, long rb)
+newtree(int ntree, long f, ColRef<int> sparse, double forget, long maxf, long nclasses, Evaluation e)
 {
-	if (X.size != f)
+	if (sparse.size != f)
 		return false;
 	int *X_cpy = (int *)malloc(f * sizeof(int));
 	
-	memcpy(X_cpy, X.container, f);
+	memcpy(X_cpy, sparse.container, f);
 
 	if (maxf < 0)
 		maxf = f;
-	dt = new DecisionTree(f, X_cpy, forget, maxf, noclasses, e);
+	// dt = new DecisionTree(f, X_cpy, forget, maxf, noclasses, e);
-	rf = new RandomForest(height, f, X_cpy, forget, noclasses, e);
+	rf = new RandomForest(ntree, f, X_cpy, forget, nclasses, e, true);
 	return true;
 }
 
@@ -53,15 +56,21 @@ __AQEXPORT__(bool)
 fit_inc(vector_type<vector_type<double>> v, vector_type<long> res)
 {
 	static uint32_t last_offset = 0;
-	double **data = (double **)malloc(v.size * sizeof(double *));
+	if(last_offset > v.size) 
-	if(last_offset >= v.size) 
 		last_offset = 0;
-	for (int i = last_offset; i < v.size; ++i)
+	const auto curr_size = (v.size - last_offset);
-		data[i] = v.container[i].container;
+	if(curr_size > 0) {
-	rf->fit(data, res.container, v.size);
+		double **data = (double **)malloc( curr_size * sizeof(double *));
+		for (uint32_t i = last_offset; i < v.size; ++i)
+			data[i - last_offset] = v.container[i].container;
+		rf->fit(data, res.container + last_offset, curr_size);
+		
+		last_offset = v.size;
 		free(data);
 		return true;
 	}
+	return false;
+}
 
 
 __AQEXPORT__(bool)

server/libaquery.cpp

@@ -620,3 +620,22 @@ vector_type<std::string_view>::vector_type(const uint32_t size, void* data) :
 	}
 	//std::cout<<size << container[1];
 }
+
+void activate_callback_based_trigger(Context* context, const char* cmd)
+{
+	const char* query_name = cmd + 2;
+	const char* action_name = query_name;
+	while (*action_name++);
+	if(auto q = get_procedure(cxt, query_name), 
+			a = get_procedure(cxt, action_name); 
+			q.name == nullptr || a.name == nullptr
+	)
+		printf("Warning: Invalid query or action name: %s %s", 
+			query_name, action_name);
+	else {
+		auto query = AQ_DupObject(&q);
+		auto action = AQ_DupObject(&a);
+
+		cxt->ct_host->execute_trigger(query, action);
+	}
+}

server/libaquery.h

@@ -291,5 +291,6 @@ inline _This_Type* AQ_DupObject(_This_Type* __val) {
 #endif //__USE_STD_SEMAPHORE__
 
 void print_monetdb_results(void* _srv, const char* sep, const char* end, uint32_t limit);
+void activate_callback_based_trigger(Context* context, const char* cmd);
 
 #endif

server/monetdb_conn.cpp

@@ -277,6 +277,84 @@ bool Server::havehge() {
 #endif
 }
 
+using prt_fn_t = char* (*)(void*, char*);
+constexpr prt_fn_t monetdbe_prtfns[] = {
+	aq_to_chars<bool>, aq_to_chars<int8_t>, aq_to_chars<int16_t>, aq_to_chars<int32_t>, 
+	aq_to_chars<int64_t>,
+#if __SIZEOF_INT128__
+	aq_to_chars<__int128_t>, 
+#endif
+	aq_to_chars<size_t>, aq_to_chars<float>, aq_to_chars<double>,
+	aq_to_chars<char*>, aq_to_chars<std::nullptr_t>,
+	aq_to_chars<types::date_t>, aq_to_chars<types::time_t>, aq_to_chars<types::timestamp_t>,
+
+	// should be last:
+	aq_to_chars<std::nullptr_t>
+};
+
+
+constexpr uint32_t output_buffer_size = 65536;
+void print_monetdb_results(void* _srv, const char* sep = " ", const char* end = "\n", 
+    uint32_t limit = std::numeric_limits<uint32_t>::max()) {
+    auto srv = static_cast<Server *>(_srv);
+    if (!srv->haserror() && srv->cnt && limit) {
+        char buffer[output_buffer_size];
+        auto _res = static_cast<monetdbe_result*> (srv->res);
+        const auto ncols = _res->ncols;
+        monetdbe_column** cols = static_cast<monetdbe_column**>(malloc(sizeof(monetdbe_column*) * ncols));
+        prt_fn_t *prtfns = (prt_fn_t*) alloca(sizeof(prt_fn_t) * ncols);
+        char** col_data = static_cast<char**> (alloca(sizeof(char*) * ncols));
+        uint8_t* szs = static_cast<uint8_t*>(alloca(ncols));
+        std::string header_string = "";
+        const char* err_msg = nullptr;
+        const size_t l_sep = strlen(sep);
+        const size_t l_end = strlen(end);
+        char* _buffer = buffer;
+        const auto cnt = srv->cnt < limit? srv->cnt : limit;
+
+        for(uint32_t i = 0; i < ncols; ++i){
+            err_msg = monetdbe_result_fetch(_res, &cols[i], i);
+            if(err_msg) { goto cleanup; }
+            col_data[i] = static_cast<char *>(cols[i]->data);
+            prtfns[i] = monetdbe_prtfns[cols[i]->type];
+            szs [i] = monetdbe_type_szs[cols[i]->type];
+            header_string = header_string + cols[i]->name + sep + '|' + sep;
+        }
+
+        if(l_sep > 512 || l_end > 512) {
+            puts("Error: separator or end string too long");
+            goto cleanup;
+        }
+		if (header_string.size() >= l_sep + 1)
+			header_string.resize(header_string.size() - l_sep - 1);
+        header_string += end + std::string(header_string.size(), '=') + end;
+        fputs(header_string.c_str(), stdout);
+        for(uint64_t i = 0; i < cnt; ++i){
+            for(uint32_t j = 0; j < ncols; ++j){
+                //copy the field to buf
+                _buffer = prtfns[j](col_data[j], _buffer);
+                if (j != ncols - 1){
+                    memcpy(_buffer, sep, l_sep);
+                    _buffer += l_sep;
+                }
+                col_data[j] += szs[j];
+            }
+            memcpy(_buffer, end, l_end);
+            _buffer += l_end;
+            if(output_buffer_size - (_buffer - buffer) <= 1024){
+                fwrite(buffer, 1, _buffer - buffer, stdout);
+                _buffer = buffer;
+            }
+        }
+        memcpy(_buffer, end, l_end);
+        _buffer += l_end;
+        if (_buffer != buffer)
+            fwrite(buffer, 1, _buffer - buffer, stdout);
+cleanup:        
+        free(cols);
+    }
+}
+
 
 int ExecuteStoredProcedureEx(const StoredProcedure *p, Context* cxt){
     auto server = static_cast<Server*>(cxt->alt_server);
@@ -302,6 +380,12 @@ int ExecuteStoredProcedureEx(const StoredProcedure *p, Context* cxt){
                     handle = p->__rt_loaded_modules[procedure_module_cursor++];
             }
             break;
+            case 'T' : {
+                if (p->queries[i][1] == 'N') {
+                    cxt->ct_host->execute_trigger(p->queries[i] + 2, cxt);
+                }
+            }
+            break;
             case 'O': {
                 uint32_t limit;
                 memcpy(&limit, p->queries[i] + 1, sizeof(uint32_t));

server/monetdb_ext.c

@@ -86,7 +86,7 @@ monetdbe_get_col(monetdbe_database dbhdl, const char *table_name, uint32_t col_i
 	mvc *m = be->mvc;
     //mvc_trans(m);
 	sql_table *t = find_table_or_view_on_scope(m, NULL, "sys", table_name, "CATALOG", false);
-	if (!t) return 0;
+	if (!t) return NULL;
 	sql_column *col = ol_fetch(t->columns, col_id);
 	sqlstore* store = m->store;
 	BAT *b = store->storage_api.bind_col(m->session->tr, col, QUICK);

server/server.cpp

@@ -94,7 +94,9 @@ have_hge() {
     return false;
 #endif
 }
+
 Context* _g_cxt;
+
 StoredProcedure
 get_procedure(Context* cxt, const char* name) {
     auto res = cxt->stored_proc.find(name);
@@ -107,11 +109,11 @@ get_procedure(Context* cxt, const char* name) {
         };
     return res->second;
 }
+
 __AQEXPORT__(StoredProcedure)
 get_procedure_ex(const char* name){
     return get_procedure(_g_cxt, name);
 }
-using prt_fn_t = char* (*)(void*, char*);
 
 // This function contains heap allocations, free after use
 template<class String_T>
@@ -128,19 +130,6 @@ char* copy_lpstr(const char* str){
     return ret;
 }
 
-constexpr prt_fn_t monetdbe_prtfns[] = {
-	aq_to_chars<bool>, aq_to_chars<int8_t>, aq_to_chars<int16_t>, aq_to_chars<int32_t>, 
-	aq_to_chars<int64_t>,
-#if __SIZEOF_INT128__
-	aq_to_chars<__int128_t>, 
-#endif
-	aq_to_chars<size_t>, aq_to_chars<float>, aq_to_chars<double>,
-	aq_to_chars<char*>, aq_to_chars<std::nullptr_t>,
-	aq_to_chars<types::date_t>, aq_to_chars<types::time_t>, aq_to_chars<types::timestamp_t>,
-
-	// should be last:
-	aq_to_chars<std::nullptr_t>
-};
 
 #ifndef __AQ_USE_THREADEDGC__
 void aq_init_gc(void *handle, Context* cxt)
@@ -157,87 +146,6 @@ void aq_init_gc(void *handle, Context* cxt)
 #define aq_init_gc(h, c) 
 #endif //__AQ_USE_THREADEDGC__
 
-#include "monetdbe.h"
-#undef max
-#undef min
-inline constexpr static unsigned char monetdbe_type_szs[] = {
-    sizeof(monetdbe_column_bool::null_value), sizeof(monetdbe_column_int8_t::null_value), 
-    sizeof(monetdbe_column_int16_t::null_value), sizeof(monetdbe_column_int32_t::null_value), 
-    sizeof(monetdbe_column_int64_t::null_value),
-#ifdef __SIZEOF_INT128__
-    sizeof(monetdbe_column_int128_t::null_value),
-#endif
-    sizeof(monetdbe_column_size_t::null_value), sizeof(monetdbe_column_float::null_value),
-    sizeof(monetdbe_column_double::null_value),
-    sizeof(monetdbe_column_str::null_value), sizeof(monetdbe_column_blob::null_value),
-    sizeof(monetdbe_data_date), sizeof(monetdbe_data_time), sizeof(monetdbe_data_timestamp),
-
-    // should be last:
-    1
-};
-constexpr uint32_t output_buffer_size = 65536;
-void print_monetdb_results(void* _srv, const char* sep = " ", const char* end = "\n", 
-    uint32_t limit = std::numeric_limits<uint32_t>::max()) {
-    auto srv = static_cast<Server *>(_srv);
-    if (!srv->haserror() && srv->cnt && limit) {
-        char buffer[output_buffer_size];
-        auto _res = static_cast<monetdbe_result*> (srv->res);
-        const auto ncols = _res->ncols;
-        monetdbe_column** cols = static_cast<monetdbe_column**>(malloc(sizeof(monetdbe_column*) * ncols));
-        prt_fn_t *prtfns = (prt_fn_t*) alloca(sizeof(prt_fn_t) * ncols);
-        char** col_data = static_cast<char**> (alloca(sizeof(char*) * ncols));
-        uint8_t* szs = static_cast<uint8_t*>(alloca(ncols));
-        std::string header_string = "";
-        const char* err_msg = nullptr;
-        const size_t l_sep = strlen(sep);
-        const size_t l_end = strlen(end);
-        char* _buffer = buffer;
-        const auto cnt = srv->cnt < limit? srv->cnt : limit;
-
-        for(uint32_t i = 0; i < ncols; ++i){
-            err_msg = monetdbe_result_fetch(_res, &cols[i], i);
-            if(err_msg) { goto cleanup; }
-            col_data[i] = static_cast<char *>(cols[i]->data);
-            prtfns[i] = monetdbe_prtfns[cols[i]->type];
-            szs [i] = monetdbe_type_szs[cols[i]->type];
-            header_string = header_string + cols[i]->name + sep + '|' + sep;
-        }
-
-        if(l_sep > 512 || l_end > 512) {
-            puts("Error: separator or end string too long");
-            goto cleanup;
-        }
-		if (header_string.size() >= l_sep + 1)
-			header_string.resize(header_string.size() - l_sep - 1);
-        header_string += end + std::string(header_string.size(), '=') + end;
-        fputs(header_string.c_str(), stdout);
-        for(uint64_t i = 0; i < cnt; ++i){
-            for(uint32_t j = 0; j < ncols; ++j){
-                //copy the field to buf
-                _buffer = prtfns[j](col_data[j], _buffer);
-                if (j != ncols - 1){
-                    memcpy(_buffer, sep, l_sep);
-                    _buffer += l_sep;
-                }
-                col_data[j] += szs[j];
-            }
-            memcpy(_buffer, end, l_end);
-            _buffer += l_end;
-            if(output_buffer_size - (_buffer - buffer) <= 1024){
-                fwrite(buffer, 1, _buffer - buffer, stdout);
-                _buffer = buffer;
-            }
-        }
-        memcpy(_buffer, end, l_end);
-        _buffer += l_end;
-        if (_buffer != buffer)
-            fwrite(buffer, 1, _buffer - buffer, stdout);
-cleanup:        
-        free(cols);
-    }
-}
-
-
 void initialize_module(const char* module_name, void* module_handle, Context* cxt){
     auto _init_module = reinterpret_cast<module_init_fn>(dlsym(module_handle, "init_session"));
     if (_init_module) {
@@ -581,25 +489,24 @@ start:
                                     }
                                 }
                                 break;
-                                case 'C': // activate callback based trigger
+                                case 'C' : //register callback based trigger
                                 {
-                                    const char* query_name = n_recvd[i] + 2;
+                                    const char* trigger_name = n_recvd[i] + 2;
+                                    const char* table_name = trigger_name;
+                                    while(*table_name++);
+                                    const char* query_name = table_name;
+                                    while(*query_name++);
                                     const char* action_name = query_name;
                                     while(*action_name++);
-                                    if(auto q = get_procedure(cxt, query_name), 
+                                    cxt->ct_host->add_trigger(trigger_name, table_name, query_name, action_name);
-                                            a = get_procedure(cxt, action_name); 
-                                            q.name == nullptr || a.name == nullptr
-                                    )
-                                        printf("Warning: Invalid query or action name: %s %s", 
-                                            query_name, action_name);
-                                    else{
-                                        auto query = AQ_DupObject(&q);
-                                        auto action = AQ_DupObject(&a);
-
-                                        cxt->ct_host->execute_trigger(query, action);
-                                    }
                                 }
                                 break;
+                                case 'A': // activate callback based trigger
+                                activate_callback_based_trigger(cxt, n_recvd[i]);
+                                break;
+                                case 'N':
+                                cxt->ct_host->execute_trigger(n_recvd[i] + 2);
+                                break;
                                 case 'R': // remove trigger
                                 {
                                     cxt->it_host->remove_trigger(n_recvd[i] + 2);

server/threading.cpp

@@ -222,6 +222,7 @@ bool IntervalBasedTrigger::tick(uint32_t delta_t) {
 CallbackBasedTriggerHost::CallbackBasedTriggerHost(ThreadPool *tp, Context *cxt) {
     this->tp = tp;
     this->cxt = cxt;
+    this->triggers = new aq_map<std::string, CallbackBasedTrigger>;
 }
 
 void CallbackBasedTriggerHost::execute_trigger(StoredProcedure* query, StoredProcedure* action) {
@@ -234,4 +235,35 @@ void CallbackBasedTriggerHost::execute_trigger(StoredProcedure* query, StoredPro
     this->tp->enqueue_task(payload);
 }
 
+void execute_trigger(const char* trigger_name) {
+    auto vt_triggers = static_cast<aq_map<std::string, CallbackBasedTrigger> *>(this->triggers);
+    auto ptr = vt_triggers->find(trigger_name);
+    if (ptr != vt_triggers->end()) {
+        auto& tr = ptr->second;
+        if (!tr.materialized) {
+            tr.query = new CallbackBasedTrigger(get_procedure(cxt, tr.query_name));
+            tr.action = new CallbackBasedTrigger(get_procedure(cxt, tr.action_name));
+            tr.materialized = true;
+        }
+        this->execute_trigger(AQ_DupObject(tr.query), AQ_DupObject(tr.action));
+    }
+}
+
+void CallbackBasedTriggerHost::add_trigger(
+    const char* trigger_name, 
+    const char* table_name, 
+    const char* query_name, 
+    const char* action_name
+) {
+    auto vt_triggers = static_cast<aq_map<std::string, CallbackBasedTrigger> *>(this->triggers);
+    auto tr = CallbackBasedTrigger {
+        .trigger_name = trigger_name, 
+        .table_name = table_name, 
+        .query_name = query_name, 
+        .action_name = action_name,
+        .materialized = false
+    };
+    vt_triggers->emplace(trigger_name, tr);
+}
+
 void CallbackBasedTriggerHost::tick() {}

server/threading.h

@@ -80,10 +80,28 @@ private:
     void tick() override;
 };
 
+struct CallbackBasedTrigger : Trigger {
+    const char* trigger_name;
+    const char* table_name;
+    union {
+        StoredProcedure* query;
+        const char* query_name;
+    };
+    union {
+        StoredProcedure* action;
+        const char* action_name;
+    };
+    bool materialized;
+};
+
 class CallbackBasedTriggerHost : public TriggerHost {
 public:
     explicit CallbackBasedTriggerHost(ThreadPool *tp, Context *cxt);
     void execute_trigger(StoredProcedure* query, StoredProcedure* action);
+    void execute_trigger(const char* trigger_name);
+    void add_trigger(const char* trigger_name, const char* table_name, 
+        const char* query_name, const char* action_name);
+
 private:
     void tick() override;
 };

server/vector_type.hpp

@@ -173,14 +173,24 @@ public:
 		if constexpr (_grow)
 			sz = this->size;
 		if (sz >= capacity) { // geometric growth 
+			bool reallocate = true;
+			if (capacity == 0 && sz > 0) 
+				[[unlikely]]
+				reallocate = false;
 			uint32_t new_capacity;
 			if constexpr (_grow)
 				new_capacity = size + 1 + (size >> 1);
 			else	
 				new_capacity = sz;
 			
-			_Ty* n_container = (_Ty*)realloc(container, new_capacity * sizeof(_Ty));
+			_Ty* n_container;
-			// memcpy(n_container, container, sizeof(_Ty) * size);
+			if (reallocate) {
+				n_container = (_Ty*)realloc(container, new_capacity * sizeof(_Ty));
+			}
+			else {
+				n_container = (_Ty*)malloc(new_capacity * sizeof(_Ty));
+				memcpy(n_container, container, sizeof(_Ty) * size);
+			}
 			memset(n_container + size, 0, sizeof(_Ty) * (new_capacity - size));
 			// if (capacity)
 			// 	free(container);

tests/rf.a

@@ -0,0 +1,16 @@
+LOAD MODULE FROM "./libirf.so"  FUNCTIONS (      newtree(height:int, f:int64, sparse:vecint, forget:double, maxf:int64, noclasses:int64, e:int) -> bool,      fit(X:vecvecdouble, y:vecint64) -> bool,      predict(X:vecvecdouble) -> vecint  );
+
+create table source(x vecdouble, y int64);
+-- Create trigger 1 ~~ to predict whenever sz(source > ?)
+-- Create trigger 2 ~~ to auto feed ~
+load complex data infile "data/electricity/electricity1.csv" into table source fields terminated by ',' element terminated by ';';
+
+create table elec_sparse(v int);    
+insert into elec_sparse values (0), (1), (1), (1), (1), (1), (1);
+
+select newtree(30, 7, elec_sparse.v, 0, 4, 2, 1) from elec_sparse
+
+select fit(x, y) from source
+
+-- select pack(x1, x2, x3, x4) from source
+select predict(x) from source