void API::Select(SQLSelect& statement) { if (current_db_.length() == 0) throw NoDatabaseSelectedException(); Table *tb = catalog_m_->GetDB(current_db_)->GetTable(statement.get_tb_name()); if (tb == NULL) throw TableNotExistException(); RecordManager *rm = new RecordManager(catalog_m_, buffer_m_, current_db_); rm->Select(statement); delete rm; }
/*查询数据*/ void API::Select(SQLSelect& sql_statement) { if (current_database_.length() == 0)/*判断当前数据库是否选定*/ { throw NoDatabaseSelectedException(); } Table *tb = catalog_manager_->GetDB(current_database_)->GetTable(sql_statement.get_tb_name()); if (tb == NULL)/*判断当前表是否存在*/ { throw TableNotExistException(); } RecordManager *rm = new RecordManager(catalog_manager_, buffer_manager_, current_database_); vector<vector<TKey>>result; result = rm->Select(sql_statement); delete rm; //cout << "查询数据" << endl; }