diff --git a/SuperScriptMaterializer/database.cpp b/SuperScriptMaterializer/database.cpp
index 18328ce..dabe66b 100644
--- a/SuperScriptMaterializer/database.cpp
+++ b/SuperScriptMaterializer/database.cpp
@@ -36,8 +36,27 @@ namespace SSMaterializer {
 
 #pragma region universal sqlite database init and free
 
-		SSMaterializerDatabase::SSMaterializerDatabase(const char* file) :
+		SSMaterializerDatabase::SSMaterializerDatabase() :
 			mStmtCache(), mDb(NULL) {
+			;
+		}
+
+		SSMaterializerDatabase::~SSMaterializerDatabase() {
+			;
+		}
+
+		sqlite3_stmt* SSMaterializerDatabase::CreateStmt(const char* str_stmt) {
+			int result;
+			sqlite3_stmt* stmt = NULL;
+			result = sqlite3_prepare_v2(mDb, str_stmt, -1, &stmt, NULL);
+			if (result != SQLITE_OK) return NULL;
+
+			// append new one
+			mStmtCache.push_back(stmt);
+			return stmt;
+		}
+
+		void SSMaterializerDatabase::FakeConstructor(const char* file) {
 			// open mDb
 			int result;
 			result = sqlite3_open(file, &mDb);
@@ -47,6 +66,13 @@ namespace SSMaterializer {
 			result = sqlite3_exec(mDb, "PRAGMA synchronous = OFF;", NULL, NULL, NULL);
 			if (result != SQLITE_OK) goto fail;
 
+			// run init
+			if (!Init()) goto fail;
+
+			//start job
+			result = sqlite3_exec(mDb, "begin;", NULL, NULL, NULL);
+			if (result != SQLITE_OK) goto fail;
+
 			return;
 		fail:
 			sqlite3_close(mDb);
@@ -54,10 +80,17 @@ namespace SSMaterializer {
 			mDb = NULL;
 		}
 
-		SSMaterializerDatabase::~SSMaterializerDatabase() {
+		void SSMaterializerDatabase::FakeDeconstructor() {
 			if (mDb == NULL) return;
 			int result;
 
+			//commit job
+			result = sqlite3_exec(mDb, "commit;", NULL, NULL, NULL);
+			if (result != SQLITE_OK) goto fail;
+
+			// run extra stuff
+			if (!Finalize()) goto fail;
+
 			//free all cached stmts and commit job
 			for (auto it = mStmtCache.begin(); it != mStmtCache.end(); it++) {
 				if (*it != NULL) {
@@ -72,15 +105,12 @@ namespace SSMaterializer {
 			mDb = NULL;
 		}
 
-		sqlite3_stmt* SSMaterializerDatabase::CreateStmt(const char* str_stmt) {
-			int result;
-			sqlite3_stmt* stmt = NULL;
-			result = sqlite3_prepare_v2(mDb, str_stmt, -1, &stmt, NULL);
-			if (result != SQLITE_OK) return NULL;
+		BOOL SSMaterializerDatabase::Init() {
+			return TRUE;
+		}
 
-			// append new one
-			mStmtCache.push_back(stmt);
-			return stmt;
+		BOOL SSMaterializerDatabase::Finalize() {
+			return TRUE;
 		}
 
 #pragma endregion
@@ -88,53 +118,21 @@ namespace SSMaterializer {
 #pragma region sub-database constructor, deconstructor and help functions
 
 		DocumentDatabase::DocumentDatabase(const char* file, CKParameterManager* paramManager) :
-			SSMaterializerDatabase(file), mUniqueAttr(), mUniqueObj(), mDbHelper(paramManager) {
-			if (!Init()) goto fail;
-
-			//start job
-			int result = sqlite3_exec(mDb, "begin;", NULL, NULL, NULL);
-			if (result != SQLITE_OK) goto fail;
-
-		fail:
-			sqlite3_close(mDb);
-			mDb = NULL;
+			SSMaterializerDatabase(), mUniqueAttr(), mUniqueObj(), mDbHelper(paramManager) {
+			FakeConstructor(file);
 		}
 
 		DocumentDatabase::~DocumentDatabase() {
-			if (!Finalize()) goto fail;
-
-			//commit job
-			int result = sqlite3_exec(mDb, "commit;", NULL, NULL, NULL);
-			if (result != SQLITE_OK) goto fail;
-
-		fail:
-			sqlite3_close(mDb);
-			mDb = NULL;
+			FakeDeconstructor();
 		}
 
 		EnvironmentDatabase::EnvironmentDatabase(const char* file) :
-			SSMaterializerDatabase(file), mDbHelper() {
-			if (!Init()) goto fail;
-
-			//start job
-			int result = sqlite3_exec(mDb, "begin;", NULL, NULL, NULL);
-			if (result != SQLITE_OK) goto fail;
-
-		fail:
-			sqlite3_close(mDb);
-			mDb = NULL;
+			SSMaterializerDatabase(), mDbHelper() {
+			FakeConstructor(file);
 		}
 
 		EnvironmentDatabase::~EnvironmentDatabase() {
-			if (!Finalize()) goto fail;
-
-			//commit job
-			int result = sqlite3_exec(mDb, "commit;", NULL, NULL, NULL);
-			if (result != SQLITE_OK) goto fail;
-
-		fail:
-			sqlite3_close(mDb);
-			mDb = NULL;
+			FakeDeconstructor();
 		}
 
 		BOOL DocumentDatabase::is_attr_duplicated(DataStruct::EXPAND_CK_ID parents) {
@@ -169,6 +167,9 @@ namespace SSMaterializer {
 if (result != SQLITE_OK) { return FALSE; }
 
 		BOOL DocumentDatabase::Init() {
+			// execute parent first
+			if (!SSMaterializerDatabase::Init()) return FALSE;
+
 			int result;
 
 			//Init table
@@ -202,6 +203,9 @@ if (result != SQLITE_OK) { return FALSE; }
 		}
 
 		BOOL DocumentDatabase::Finalize() {
+			// execute parent first
+			if (!SSMaterializerDatabase::Finalize()) return FALSE;
+
 			//create index for quick select in SuperScriptDecorator
 			int result;
 
@@ -225,6 +229,9 @@ if (result != SQLITE_OK) { return FALSE; }
 		}
 
 		BOOL EnvironmentDatabase::Init() {
+			// execute parent first
+			if (!SSMaterializerDatabase::Init()) return FALSE;
+
 			int result;
 
 			//init table
@@ -242,6 +249,9 @@ if (result != SQLITE_OK) { return FALSE; }
 		}
 
 		BOOL EnvironmentDatabase::Finalize() {
+			// execute parent first
+			if (!SSMaterializerDatabase::Finalize()) return FALSE;
+
 			return TRUE;
 		}
 
diff --git a/SuperScriptMaterializer/database.hpp b/SuperScriptMaterializer/database.hpp
index 131d92f..d8755cb 100644
--- a/SuperScriptMaterializer/database.hpp
+++ b/SuperScriptMaterializer/database.hpp
@@ -306,11 +306,15 @@ namespace SSMaterializer {
 
 		class SSMaterializerDatabase {
 		public:
-			SSMaterializerDatabase(const char* file);
+			SSMaterializerDatabase();
 			virtual ~SSMaterializerDatabase();
 
 		protected:
 			sqlite3_stmt* CreateStmt(const char* stmt);
+			void FakeConstructor(const char* file);
+			void FakeDeconstructor();
+			virtual BOOL Init();
+			virtual BOOL Finalize();
 
 			sqlite3* mDb;
 			std::vector<sqlite3_stmt*> mStmtCache;
@@ -348,8 +352,8 @@ namespace SSMaterializer {
 			BOOL is_obj_duplicated(DataStruct::EXPAND_CK_ID parents);
 
 		protected:
-			BOOL Init();
-			BOOL Finalize();
+			virtual BOOL Init() override;
+			virtual BOOL Finalize() override;
 
 			std::set<DataStruct::EXPAND_CK_ID> mUniqueAttr;
 			std::set<DataStruct::EXPAND_CK_ID> mUniqueObj;
@@ -368,8 +372,8 @@ namespace SSMaterializer {
 			void write_variable(DataStruct::dbenv_variable& data);
 
 		protected:
-			BOOL Init();
-			BOOL Finalize();
+			virtual BOOL Init() override;
+			virtual BOOL Finalize() override;
 		};
 
 	}
diff --git a/SuperScriptMaterializer/doc_export.cpp b/SuperScriptMaterializer/doc_export.cpp
index 17167bd..e6a2373 100644
--- a/SuperScriptMaterializer/doc_export.cpp
+++ b/SuperScriptMaterializer/doc_export.cpp
@@ -561,6 +561,7 @@ namespace SSMaterializer {
 						CKParameter* p = NULL;
 						CK_CLASSID objcls;
 						int param_size = 0;
+						BOOL need_evaluate = FALSE;
 
 						for (int row = 0; row < rows; ++row) {
 							mDb->mDbHelper.array_cell.column = col;
@@ -578,11 +579,13 @@ namespace SSMaterializer {
 								// use class id
 								objcls = obj->GetClassID();
 								if (objcls == CKCID_PARAMETER || objcls == CKCID_PARAMETERLOCAL || objcls == CKCID_PARAMETEROUT) {
+									need_evaluate = objcls == CKCID_PARAMETEROUT;
+
 									// CKParameter
 									p = (CKParameter*)obj;
-									param_size = p->GetStringValue(NULL, FALSE);
+									param_size = p->GetStringValue(NULL, need_evaluate);
 									mDb->mDbHelper.array_cell.showcase.resize(param_size);
-									p->GetStringValue((char*)mDb->mDbHelper.array_cell.showcase.data(), FALSE);
+									p->GetStringValue((char*)mDb->mDbHelper.array_cell.showcase.data(), need_evaluate);
 
 									mDb->mDbHelper.array_cell.inner_param = p->GetID();
 
@@ -715,7 +718,8 @@ namespace SSMaterializer {
 			}
 			if (t == CKPGUID_2DCURVE) {
 				//CK2dCurve* c;
-				CK2dCurve* c = (CK2dCurve*)p->GetReadDataPtr(false);
+				CK2dCurve* c = NULL;
+				memcpy(&c, p->GetReadDataPtr(false), sizeof(c));
 
 				// we need construct a fake json body as our data
 				static std::string str_2dcurve;
@@ -757,6 +761,7 @@ namespace SSMaterializer {
 
 					str_2dcurve += '}';
 				}
+				str_2dcurve = "]";
 				DataDictWritter("2dcurve", str_2dcurve.c_str(), mDb, parents);
 				return;
 			}