protected function findTableNames($schema = '')
    {
        $pdo = $this->db->getSlavePdo();
        $tables = $pdo->cubrid_schema(\PDO::CUBRID_SCH_TABLE);
        $tableNames = [];
        foreach ($tables as $table) {
            // do not list system tables
            if ($table['TYPE'] != 0) {
                $tableNames[] = $table['NAME'];
            }
        }

        return $tableNames;
    }
protected function findTableNames($schema = '')
    {
        $pdo = $this->db->getSlavePdo();
        $tables = $pdo->cubrid_schema(\PDO::CUBRID_SCH_TABLE);
        $tableNames = [];
        foreach ($tables as $table) {
            // do not list system tables
            if ($table['TYPE'] != 0) {
                $tableNames[] = $table['NAME'];
            }
        }

        return $tableNames;
    }
{@inheritdoc}