presto-memsql/src/main/java/io/prestosql/plugin/memsql/MemSqlClient.java/MemSqlClient/getTableSchemaName
class MemSqlClient:    @Override
    protected String getTableSchemaName(ResultSet resultSet)
            throws SQLException
    {
        // MemSQL uses catalogs instead of schemas
        return resultSet.getString("TABLE_CAT");
    }