Fix MAINTAIN privilege for older versions

Author: laurenz

pg_permissions--1.3.sql

@@ -41,7 +41,12 @@ SELECT obj_type 'TABLE' AS object_type,
        has_table_privilege(r.oid, t.oid, p.perm) AS granted
 FROM pg_catalog.pg_class AS t
    CROSS JOIN pg_catalog.pg_roles AS r
-   CROSS JOIN (VALUES (TEXT 'SELECT'), ('INSERT'), ('UPDATE'), ('DELETE'), ('TRUNCATE'), ('REFERENCES'), ('TRIGGER'), ('MAINTAIN')) AS p(perm)
+   CROSS JOIN unnest(
+                 CASE WHEN current_setting('server_version_num')::integer < 170000
+                      THEN ARRAY['SELECT','INSERT','UPDATE','DELETE','TRUNCATE','REFERENCES','TRIGGER']
+                      ELSE ARRAY['SELECT','INSERT','UPDATE','DELETE','TRUNCATE','REFERENCES','TRIGGER','MAINTAIN']
+                 END
+              ) AS p(perm)
 WHERE t.relnamespace::regnamespace::name <> 'information_schema'
   AND t.relnamespace::regnamespace::name NOT LIKE 'pg_%'
   AND t.relkind = 'r'
@@ -59,7 +64,12 @@ SELECT obj_type 'VIEW' AS object_type,
        has_table_privilege(r.oid, t.oid, p.perm) AS granted
 FROM pg_catalog.pg_class AS t
    CROSS JOIN pg_catalog.pg_roles AS r
-   CROSS JOIN (VALUES (TEXT 'SELECT'), ('INSERT'), ('UPDATE'), ('DELETE'), ('TRUNCATE'), ('REFERENCES'), ('TRIGGER'), ('MAINTAIN')) AS p(perm)
+   CROSS JOIN unnest(
+                 CASE WHEN current_setting('server_version_num')::integer < 170000
+                      THEN ARRAY['SELECT','INSERT','UPDATE','DELETE','TRUNCATE','REFERENCES','TRIGGER']
+                      ELSE ARRAY['SELECT','INSERT','UPDATE','DELETE','TRUNCATE','REFERENCES','TRIGGER','MAINTAIN']
+                 END
+              ) AS p(perm)
 WHERE t.relnamespace::regnamespace::name <> 'information_schema'
   AND t.relnamespace::regnamespace::name NOT LIKE 'pg_%'
   AND t.relkind = 'v'