redshift 전반적인 권한 확인할때 유용한 쿼리 WITH grantor AS( SELECT usesysid, usename FROM pg_user), schemas AS( SELECT oid, nspname, nspacl, nspowner FROM pg_namespace), grantee AS (( SELECT pg_user.usesysid AS usesysid, 0 AS grosysid, pg_user.usename AS usename FROM pg_user..