showGeometryTypeQuery: (tableName: string, schemaName?: string) => {
    return `SELECT f_geometry_column AS column_name, type AS udt_name, srid AS data_type, coord_dimension AS element_type
    FROM geometry_columns
    WHERE f_table_name = '${tableName}'` + (!schemaName ? '' : ` AND f_table_schema = '${schemaName}'`);
  }