PostgreSQL Obtener columnas de una tabla

SELECT
    t1.COLUMN_NAME AS columna_nombre,
    t1.COLUMN_DEFAULT AS columna_defecto,
    t1.IS_NULLABLE AS columna_nulo,
    t1.DATA_TYPE AS columna_tipo_dato,
    COALESCE(t1.NUMERIC_PRECISION,
    t1.CHARACTER_MAXIMUM_LENGTH) AS columna_longitud,
    PG_CATALOG.COL_DESCRIPTION(t2.OID,
    t1.DTD_IDENTIFIER::int) AS columna_descripcion,
    t1.DOMAIN_NAME AS columna_dominio
FROM 
    INFORMATION_SCHEMA.COLUMNS t1
    INNER JOIN PG_CLASS t2 ON (t2.RELNAME = t1.TABLE_NAME)
WHERE 
    t1.TABLE_SCHEMA = '[NOMBRE_ESQUEMA]' AND
    t1.TABLE_NAME = '[NOMBRE_TABLA]'
ORDER BY
    t1.ORDINAL_POSITION;