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Add sequence USAGE privileges to information schema

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The sequence USAGE privilege is sufficiently similar to the SQL
standard that it seems reasonable to show in the information schema.
Also add some compatibility notes about it on the GRANT reference
page.
This commit is contained in:
Peter Eisentraut
2012-01-30 21:45:42 +02:00
parent ee7fa66b19
commit 82e83f46a2
3 changed files with 59 additions and 3 deletions
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37
src/backend/catalog/information_schema.sql
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@ -2212,6 +2212,43 @@ CREATE VIEW usage_privileges AS
WHERE u_grantor.oid = srv.grantor
AND grantee.oid = srv.grantee
AND srv.prtype IN ('USAGE')
AND (pg_has_role(u_grantor.oid, 'USAGE')
OR pg_has_role(grantee.oid, 'USAGE')
OR grantee.rolname = 'PUBLIC')
UNION ALL
/* sequences */
SELECT CAST(u_grantor.rolname AS sql_identifier) AS grantor,
CAST(grantee.rolname AS sql_identifier) AS grantee,
CAST(current_database() AS sql_identifier) AS object_catalog,
CAST(n.nspname AS sql_identifier) AS object_schema,
CAST(c.relname AS sql_identifier) AS object_name,
CAST('SEQUENCE' AS character_data) AS object_type,
CAST('USAGE' AS character_data) AS privilege_type,
CAST(
CASE WHEN
-- object owner always has grant options
pg_has_role(grantee.oid, c.relowner, 'USAGE')
OR c.grantable
THEN 'YES' ELSE 'NO' END AS yes_or_no) AS is_grantable
FROM (
SELECT oid, relname, relnamespace, relkind, relowner, (aclexplode(coalesce(relacl, acldefault('r', relowner)))).* FROM pg_class
) AS c (oid, relname, relnamespace, relkind, relowner, grantor, grantee, prtype, grantable),
pg_namespace n,
pg_authid u_grantor,
(
SELECT oid, rolname FROM pg_authid
UNION ALL
SELECT 0::oid, 'PUBLIC'
) AS grantee (oid, rolname)
WHERE c.relnamespace = n.oid
AND c.relkind = 'S'
AND c.grantee = grantee.oid
AND c.grantor = u_grantor.oid
AND c.prtype IN ('USAGE')
AND (pg_has_role(u_grantor.oid, 'USAGE')
OR pg_has_role(grantee.oid, 'USAGE')
OR grantee.rolname = 'PUBLIC');