C++ Constraint::SetRefCol方法代码示例

bool MySqlDbAdapter::GetColumns(Table* pTab)
{
	DatabaseLayerPtr dbLayer = this->GetDatabaseLayer(wxT(""));

	if (!dbLayer->IsOpen()) return NULL;
	// loading columns
	//TODO:SQL:
	DatabaseResultSet *database = dbLayer->RunQueryWithResults(wxString::Format(wxT("SHOW COLUMNS IN `%s`.`%s`"),pTab->GetParentName().c_str(),pTab->GetName().c_str()));
	while (database->Next()) {
		IDbType* pType = parseTypeString(database->GetResultString(2));
		if (pType) {
			Column* pCol = new Column(database->GetResultString(1),pTab->GetName(), pType);
			pTab->AddChild(pCol);
		}
	}
	dbLayer->CloseResultSet(database);

	//TODO:SQL:
	wxString constrSql = wxT("SELECT K.CONSTRAINT_SCHEMA, K.CONSTRAINT_NAME,K.TABLE_NAME,K.COLUMN_NAME,K.REFERENCED_TABLE_NAME,K.REFERENCED_COLUMN_NAME,R.UPDATE_RULE, R.DELETE_RULE FROM information_schema.KEY_COLUMN_USAGE K LEFT JOIN information_schema.REFERENTIAL_CONSTRAINTS R ON R.CONSTRAINT_NAME = K.CONSTRAINT_NAME AND K.CONSTRAINT_SCHEMA = R.CONSTRAINT_SCHEMA WHERE K.CONSTRAINT_SCHEMA = '%s' AND K.TABLE_NAME = '%s'");
	database = dbLayer->RunQueryWithResults(wxString::Format(constrSql, pTab->GetParentName().c_str(),pTab->GetName().c_str()));
	while (database->Next()) {
		Constraint* constr = new Constraint();
		constr->SetName(database->GetResultString(wxT("CONSTRAINT_NAME")));
		constr->SetLocalColumn(database->GetResultString(wxT("COLUMN_NAME")));
		constr->SetType(Constraint::primaryKey);
		if (database->GetResultString(wxT("REFERENCED_TABLE_NAME")) != wxT("") ) {
			constr->SetType(Constraint::foreignKey);
			constr->SetRefTable(database->GetResultString(wxT("REFERENCED_TABLE_NAME")));
			constr->SetRefCol(database->GetResultString(wxT("REFERENCED_COLUMN_NAME")));

			wxString onDelete = database->GetResultString(wxT("UPDATE_RULE"));
			if (onDelete == wxT("RESTRICT")) constr->SetOnUpdate(Constraint::restrict);
			if (onDelete == wxT("CASCADE")) constr->SetOnUpdate(Constraint::cascade);
			if (onDelete == wxT("SET NULL")) constr->SetOnUpdate(Constraint::setNull);
			if (onDelete == wxT("NO ACTION")) constr->SetOnUpdate(Constraint::noAction);

			wxString onUpdate = database->GetResultString(wxT("DELETE_RULE"));
			if (onUpdate == wxT("RESTRICT")) constr->SetOnDelete(Constraint::restrict);
			if (onUpdate == wxT("CASCADE")) constr->SetOnDelete(Constraint::cascade);
			if (onUpdate == wxT("SET NULL")) constr->SetOnDelete(Constraint::setNull);
			if (onUpdate == wxT("NO ACTION")) constr->SetOnDelete(Constraint::noAction);


		}
		pTab->AddChild(constr);
	}
	dbLayer->CloseResultSet(database);
	dbLayer->Close();
	return true;
}

bool PostgreSqlDbAdapter::GetColumns(Table* pTab) {
	if (pTab) {
//		SetDatabase(pTab->GetParentName());
		DatabaseLayerPtr dbLayer = this->GetDatabaseLayer(pTab->GetParentName());

		if (!dbLayer->IsOpen()) return NULL;
		// loading columns
		//TODO:SQL:
		//DatabaseResultSet *database = dbLayer->RunQueryWithResults(wxString::Format(wxT("SHOW COLUMNS IN `%s`.`%s`"),pTab->getParentName().c_str(),pTab->getName().c_str()));
		DatabaseResultSet *database = dbLayer->RunQueryWithResults(wxString::Format(wxT("SELECT * FROM information_schema.columns WHERE table_name = '%s'"),pTab->GetName().c_str()));


		while (database->Next()) {
			IDbType* pType = parseTypeString(database->GetResultString(wxT("data_type")));
			if (pType) {
				pType->SetSize(database->GetResultInt(wxT("numeric_precision")));
				pType->SetSize2(database->GetResultInt(wxT("numeric_precision_radix")));
				pType->SetNotNull(database->GetResultString(wxT("is_nullable")) == wxT("NO"));
				Column* pCol = new Column(database->GetResultString(wxT("column_name")),pTab->GetName(), pType);
				pTab->AddChild(pCol);
			}
		}
		dbLayer->CloseResultSet(database);



//wxT("SELECT tc.constraint_name, tc.constraint_type, tc.table_name, kcu.column_name, tc.is_deferrable, tc.initially_deferred, rc.match_option AS match_type, rc.update_rule AS on_update, rc.delete_rule AS on_delete, ccu.table_name AS references_table, ccu.column_name AS references_field FROM information_schema.table_constraints tc LEFT JOIN information_schema.key_column_usage kcu ON tc.constraint_catalog = kcu.constraint_catalog AND tc.constraint_schema = kcu.constraint_schema AND tc.constraint_name = kcu.constraint_name LEFT JOIN information_schema.referential_constraints rc ON tc.constraint_catalog = rc.constraint_catalog AND tc.constraint_schema = rc.constraint_schema AND tc.constraint_name = rc.constraint_name LEFT JOIN information_schema.constraint_column_usage ccu ON rc.unique_constraint_catalog = ccu.constraint_catalog AND rc.unique_constraint_schema = ccu.constraint_schema AND rc.unique_constraint_name = ccu.constraint_name WHERE tc.table_name = '%s'");



		//TODO:SQL:
		wxString constrSql = wxT("SELECT tc.constraint_name, tc.constraint_type, tc.table_name, kcu.column_name, tc.is_deferrable, tc.initially_deferred, rc.match_option AS match_type, rc.update_rule AS on_update, rc.delete_rule AS on_delete, ccu.table_name AS references_table, ccu.column_name AS references_field FROM information_schema.table_constraints tc LEFT JOIN information_schema.key_column_usage kcu ON tc.constraint_catalog = kcu.constraint_catalog AND tc.constraint_schema = kcu.constraint_schema AND tc.constraint_name = kcu.constraint_name LEFT JOIN information_schema.referential_constraints rc ON tc.constraint_catalog = rc.constraint_catalog AND tc.constraint_schema = rc.constraint_schema AND tc.constraint_name = rc.constraint_name LEFT JOIN information_schema.constraint_column_usage ccu ON rc.unique_constraint_catalog = ccu.constraint_catalog AND rc.unique_constraint_schema = ccu.constraint_schema AND rc.unique_constraint_name = ccu.constraint_name WHERE tc.table_name = '%s'");

		database = dbLayer->RunQueryWithResults(wxString::Format(constrSql, pTab->GetName().c_str()));
		while (database->Next()) {
			if ((database->GetResultString(wxT("constraint_type")) == wxT("PRIMARY KEY"))||(database->GetResultString(wxT("constraint_type")) == wxT("FOREIGN KEY"))) {
				Constraint* constr = new Constraint();
				constr->SetName(database->GetResultString(wxT("constraint_name")));
				constr->SetLocalColumn(database->GetResultString(wxT("column_name")));
				constr->SetType(Constraint::primaryKey);
				if (database->GetResultString(wxT("references_table")) != wxT("") ) {
					constr->SetType(Constraint::foreignKey);
					constr->SetRefTable(database->GetResultString(wxT("references_table")));
					constr->SetRefCol(database->GetResultString(wxT("references_field")));

					wxString onDelete = database->GetResultString(wxT("on_update"));
					if (onDelete == wxT("RESTRICT")) constr->SetOnUpdate(Constraint::restrict);
					if (onDelete == wxT("CASCADE")) constr->SetOnUpdate(Constraint::cascade);
					if (onDelete == wxT("SET NULL")) constr->SetOnUpdate(Constraint::setNull);
					if (onDelete == wxT("NO ACTION")) constr->SetOnUpdate(Constraint::noAction);

					wxString onUpdate = database->GetResultString(wxT("on_delete"));
					if (onUpdate == wxT("RESTRICT")) constr->SetOnDelete(Constraint::restrict);
					if (onUpdate == wxT("CASCADE")) constr->SetOnDelete(Constraint::cascade);
					if (onUpdate == wxT("SET NULL")) constr->SetOnDelete(Constraint::setNull);
					if (onUpdate == wxT("NO ACTION")) constr->SetOnDelete(Constraint::noAction);


				}
				pTab->AddChild(constr);
			}
		}
		dbLayer->CloseResultSet(database);
		dbLayer->Close();
	}
	return true;
}