查詢 PostgreSql 指定表的字段集合

   SELECT A.attname AS "column"
    FROM
    pg_catalog.pg_attribute A
    WHERE
    A.attnum > 0
    AND NOT A.attisdropped
    AND A.attrelid = (
    SELECT C.oid
    FROM pg_catalog.pg_class C
    LEFT JOIN pg_catalog.pg_namespace n ON n.oid = C.relnamespace
    WHERE
    C.relname = '要查詢的數據庫表名'
    AND pg_catalog.pg_table_is_visible ( C.oid )
    )