diff --git a/datagen.cpp b/datagen.cpp
index 41fbfc0..418caf5 100644
--- a/datagen.cpp
+++ b/datagen.cpp
@@ -52,7 +52,7 @@ int gen_trade_data(int argc, char* argv[])
         printf("No parameter supplied. Use default frac=%f, N=%d? [Y/n]\n", frac, N);
         char buf[4096]; fgets(buf, 4095, stdin); 
         if((buf[0] != 'y' && buf[0] !='Y') && buf[0] != '\n') { 
-            const auto &getParams = [&](){ puts("Type: frac N [ENTER]");
+            const auto &getParams = [&](){ puts("Type: frac N n_rows [ENTER]");
                 for(int i = 0; i < 4096; ++i) if(buf[i] == '\n') {buf[i] = 0; break;}
                 char* _buf = buf; frac = getFloat(_buf); N = getInt(_buf); n_rows=getInt(_buf);
             }; getParams();
@@ -102,7 +102,7 @@ int gen_trade_data(int argc, char* argv[])
             current_price = new_price;
         }
         d[i]= {ss, i+1, (int)g_quantity(engine), current_price};
-        fprintf(fp, "s%d, %d, %d, %d\n", d[i].ss, d[i].t, d[i].q, d[i].p);
+        fprintf(fp, "%d, %d, %d, %d\n", d[i].ss, d[i].t, d[i].q, d[i].p);
         last_price[ss - 1] = current_price;
     }
     fclose(fp);
@@ -148,8 +148,9 @@ int gen_stock_data(int argc, char* argv[]){
         fprintf(fp, "%s,%s\n", IDs[i].c_str(), names[i].c_str());
     }
     fclose(fp);
+    return 0;
 }
 
 int main(int argc, char* argv[]){
-    return gen_stock_data(argc, argv);
+    return gen_trade_data(argc, argv);
 }
diff --git a/msc-plugin/libaquery.vcxproj b/msc-plugin/libaquery.vcxproj
index 85cb9f2..47ae736 100644
--- a/msc-plugin/libaquery.vcxproj
+++ b/msc-plugin/libaquery.vcxproj
@@ -130,7 +130,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllexport);_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <LanguageStandard_C>stdc17</LanguageStandard_C>
@@ -156,7 +156,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllexport);_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <LanguageStandard_C>stdc17</LanguageStandard_C>
@@ -197,7 +197,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllexport);_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <LanguageStandard_C>stdc17</LanguageStandard_C>
@@ -236,7 +236,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllexport);_CRT_SECURE_NO_WARNINGS;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <LanguageStandard_C>stdc17</LanguageStandard_C>
@@ -266,7 +266,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllexport);_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <LanguageStandard_C>stdc17</LanguageStandard_C>
@@ -307,7 +307,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllexport);_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <LanguageStandard_C>stdc17</LanguageStandard_C>
diff --git a/msc-plugin/msc-plugin.vcxproj b/msc-plugin/msc-plugin.vcxproj
index ab76513..6ed1a4b 100644
--- a/msc-plugin/msc-plugin.vcxproj
+++ b/msc-plugin/msc-plugin.vcxproj
@@ -134,7 +134,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllimport);_CRT_SECURE_NO_WARNINGS;WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <ControlFlowGuard>Guard</ControlFlowGuard>
@@ -166,7 +166,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllimport);_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <AdditionalIncludeDirectories>$(ProjectDir)\..\monetdb\msvc</AdditionalIncludeDirectories>
@@ -209,7 +209,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllimport);_CRT_SECURE_NO_WARNINGS;WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <AdditionalIncludeDirectories>$(ProjectDir)\..\monetdb\msvc</AdditionalIncludeDirectories>
@@ -250,7 +250,7 @@
     <ClCompile>
       <WarningLevel>Level3</WarningLevel>
       <SDLCheck>true</SDLCheck>
-      <PreprocessorDefinitions>_ALLOW_RTCc_IN_STL;_CRT_SECURE_NO_WARNINGS;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllimport);_ALLOW_RTCc_IN_STL;_CRT_SECURE_NO_WARNINGS;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <ControlFlowGuard>false</ControlFlowGuard>
@@ -300,7 +300,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllimport);_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <AdditionalIncludeDirectories>$(ProjectDir)\..\monetdb\msvc</AdditionalIncludeDirectories>
@@ -343,7 +343,7 @@
       <FunctionLevelLinking>true</FunctionLevelLinking>
       <IntrinsicFunctions>true</IntrinsicFunctions>
       <SDLCheck>false</SDLCheck>
-      <PreprocessorDefinitions>_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>QUERY_DECLSPEC=__declspec(dllimport);_CRT_SECURE_NO_WARNINGS;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpplatest</LanguageStandard>
       <AdditionalIncludeDirectories>$(ProjectDir)\..\monetdb\msvc</AdditionalIncludeDirectories>
diff --git a/msc-plugin/server.sln b/msc-plugin/server.sln
index 6e2e70f..5ac7e0f 100644
--- a/msc-plugin/server.sln
+++ b/msc-plugin/server.sln
@@ -24,6 +24,10 @@ EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testmain", "testmain.vcxproj", "{73BD0DDA-7E66-4318-B46B-B8207AFA6355}"
 	ProjectSection(ProjectDependencies) = postProject
 		{8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81} = {8081FDAA-4D13-4B7A-ADB2-8224AF7F1C81}
+	EndProjectSection
+EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "datagen", "datagen\datagen.vcxproj", "{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}"
+	ProjectSection(ProjectDependencies) = postProject
 		{B52AACF7-16A6-4FCA-90AD-867D367BDA4F} = {B52AACF7-16A6-4FCA-90AD-867D367BDA4F}
 	EndProjectSection
 EndProject
@@ -169,6 +173,26 @@ Global
 		{73BD0DDA-7E66-4318-B46B-B8207AFA6355}.sharedlib|x64.Build.0 = sharedlib|x64
 		{73BD0DDA-7E66-4318-B46B-B8207AFA6355}.sharedlib|x86.ActiveCfg = sharedlib|Win32
 		{73BD0DDA-7E66-4318-B46B-B8207AFA6355}.sharedlib|x86.Build.0 = sharedlib|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Debug|x64.ActiveCfg = Debug|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Debug|x64.Build.0 = Debug|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Debug|x86.ActiveCfg = Debug|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Debug|x86.Build.0 = Debug|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Release|x64.ActiveCfg = Release|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Release|x64.Build.0 = Release|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Release|x86.ActiveCfg = Release|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.Release|x86.Build.0 = Release|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.RelWDbgInf|x64.ActiveCfg = Release|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.RelWDbgInf|x64.Build.0 = Release|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.RelWDbgInf|x86.ActiveCfg = Release|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.RelWDbgInf|x86.Build.0 = Release|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.shared|x64.ActiveCfg = Debug|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.shared|x64.Build.0 = Debug|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.shared|x86.ActiveCfg = Debug|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.shared|x86.Build.0 = Debug|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.sharedlib|x64.ActiveCfg = Debug|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.sharedlib|x64.Build.0 = Debug|x64
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.sharedlib|x86.ActiveCfg = Debug|Win32
+		{5AA4E63C-CFF8-467C-8872-84206CEDE7A9}.sharedlib|x86.Build.0 = Debug|Win32
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
diff --git a/msc-plugin/testmain.vcxproj b/msc-plugin/testmain.vcxproj
index b89ef43..6ace1e2 100644
--- a/msc-plugin/testmain.vcxproj
+++ b/msc-plugin/testmain.vcxproj
@@ -219,6 +219,7 @@
       <AdditionalDependencies>..\libaquery.lib;$(ProjectDir)\..\monetdb\msvc\monetdbe.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <DataExecutionPrevention>false</DataExecutionPrevention>
       <AdditionalOptions>/WHOLEARCHIVE:libaquery.lib %(AdditionalOptions)</AdditionalOptions>
+      <Profile>true</Profile>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='RelWDbgInf|Win32'">
@@ -319,6 +320,7 @@
       <AdditionalDependencies>..\libaquery.lib;$(ProjectDir)\..\monetdb\msvc\monetdbe.lib;%(AdditionalDependencies)</AdditionalDependencies>
       <DataExecutionPrevention>false</DataExecutionPrevention>
       <AdditionalOptions>/WHOLEARCHIVE:libaquery.lib %(AdditionalOptions)</AdditionalOptions>
+      <Profile>true</Profile>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='RelWDbgInf|x64'">
diff --git a/server/cpp.hint b/server/cpp.hint
index 90950e7..3c50d78 100644
--- a/server/cpp.hint
+++ b/server/cpp.hint
@@ -4,3 +4,4 @@
 #define Ops(o) template<typename T> vector_type<typename types::Coercion<_Ty, T>::type> operator##o(const vector_type<T>& r) { [[likely]] if (r.size == size) { return add(r); } else if (r.size == 1 || size == 1) { const bool lr = size == 1; const uint32_t& _size = lr ? r.size : size; const auto& _container = lr ? r.container : container; const auto& scalar = *(lr ? container : r.container); vector_type<typename types::Coercion<_Ty, T>::type> ret(_size); for (int i = 0; i < _size; ++i) ret[i] = _container[i] o scalar; return ret; } }
 #define Op(o, x) template<typename T> vector_type<typename types::Coercion<_Ty, T>::type> inline x(const vector_type<T>& r) { vector_type<typename types::Coercion<_Ty, T>::type> ret(size); for (int i = 0; i < size; ++i) ret[i] = container[i] o r[i]; return ret; }
 #define _Make_Ops(M) M(+, add) M(-, minus) M(*, multi) M(/, div) M(%, mod) M(&, and) M(|, or) M(^, xor) 
+#define QUERY_DECLSPEC
diff --git a/server/gc.h b/server/gc.h
index d8e84f8..27ce8d9 100644
--- a/server/gc.h
+++ b/server/gc.h
@@ -1,7 +1,10 @@
 #pragma once
 #include <atomic>
+#ifndef QUERY_DECLSPEC
+#define QUERY_DECLSPEC
+#endif
 
-class ScratchSpace {
+class QUERY_DECLSPEC ScratchSpace {
 public:
 	void* ret;
 	char* scratchspace;
@@ -10,7 +13,7 @@ public:
 	size_t capacity;
 	size_t initial_capacity;
 	void* temp_memory_fractions;
-
+	
 	//uint8_t status; 
 	// record maximum size
 	constexpr static uint8_t Grow = 0x1;
@@ -36,7 +39,7 @@ public:
 
 
 #ifndef __AQ_USE_THREADEDGC__
-class GC {
+class QUERY_DECLSPEC GC {
 private:
 	size_t max_slots, 
 		   interval, forced_clean, 
diff --git a/server/unordered_dense.h b/server/unordered_dense.h
index 03b6fc0..4115f6a 100644
--- a/server/unordered_dense.h
+++ b/server/unordered_dense.h
@@ -96,6 +96,9 @@
 #        define ANKERL_UNORDERED_DENSE_UNLIKELY(x) (x) // NOLINT(cppcoreguidelines-macro-usage)
 #    endif
 
+template<class Key, class Hash>
+class AQHashTable;
+
 namespace ankerl::unordered_dense {
 inline namespace ANKERL_UNORDERED_DENSE_NAMESPACE {
 
@@ -418,6 +421,7 @@ public:
     using iterator = typename value_container_type::iterator;
     using const_iterator = typename value_container_type::const_iterator;
     using bucket_type = Bucket;
+    friend class AQHashTable<Key, Hash>;
 
 private:
     using value_idx_type = decltype(Bucket::m_value_idx);
diff --git a/server/vector_type.hpp b/server/vector_type.hpp
index 3cf6057..c9628e9 100644
--- a/server/vector_type.hpp
+++ b/server/vector_type.hpp
@@ -474,6 +474,7 @@ public:
 	explicit AQHashTable(uint32_t sz) 
 		: ankerl::unordered_dense::set<Key, Hash>{} {
 		this->reserve(sz);
+		this->m_values.reserve(sz);
 		reversemap = static_cast<uint32_t *>(malloc(sizeof(uint32_t) * sz * 2));
 		mapbase = reversemap + sz;
 		ht_base =  static_cast<uint32_t *>(calloc(sz, sizeof(uint32_t)));