DROP ROLE IF EXISTS su;
NOTICE:  role "su" does not exist, skipping
CREATE USER su WITH SUPERUSER;
SET ROLE su;
CREATE EXTENSION pg_stat_monitor;
CREATE USER u1;
SELECT pg_stat_monitor_reset();
 pg_stat_monitor_reset 
-----------------------
 
(1 row)

SELECT routine_schema, routine_name, routine_type, data_type FROM information_schema.routines WHERE routine_schema = 'public' ORDER BY routine_name COLLATE "C";
 routine_schema |       routine_name       | routine_type | data_type 
----------------+--------------------------+--------------+-----------
 public         | decode_error_level       | FUNCTION     | text
 public         | get_cmd_type             | FUNCTION     | text
 public         | get_histogram_timings    | FUNCTION     | text
 public         | histogram                | FUNCTION     | record
 public         | pg_stat_monitor_internal | FUNCTION     | record
 public         | pg_stat_monitor_reset    | FUNCTION     | void
 public         | pg_stat_monitor_version  | FUNCTION     | text
 public         | pgsm_create_11_view      | FUNCTION     | integer
 public         | pgsm_create_13_view      | FUNCTION     | integer
 public         | pgsm_create_14_view      | FUNCTION     | integer
 public         | pgsm_create_15_view      | FUNCTION     | integer
 public         | pgsm_create_17_view      | FUNCTION     | integer
 public         | pgsm_create_view         | FUNCTION     | integer
 public         | range                    | FUNCTION     | ARRAY
(14 rows)

SET ROLE u1;
SELECT routine_schema, routine_name, routine_type, data_type FROM information_schema.routines WHERE routine_schema = 'public' ORDER BY routine_name COLLATE "C";
 routine_schema |       routine_name       | routine_type | data_type 
----------------+--------------------------+--------------+-----------
 public         | decode_error_level       | FUNCTION     | text
 public         | get_cmd_type             | FUNCTION     | text
 public         | get_histogram_timings    | FUNCTION     | text
 public         | histogram                | FUNCTION     | record
 public         | pg_stat_monitor_internal | FUNCTION     | record
 public         | pg_stat_monitor_version  | FUNCTION     | text
 public         | range                    | FUNCTION     | ARRAY
(7 rows)

SET ROLE su;
DROP USER u1;
DROP EXTENSION pg_stat_monitor;
DROP USER su;
ERROR:  current user cannot be dropped