CREATE EXTENSION pg_wait_sampling;
\d pg_wait_sampling_current
        View "public.pg_wait_sampling_current"
   Column   |  Type   | Collation | Nullable | Default 
------------+---------+-----------+----------+---------
 pid        | integer |           |          | 
 event_type | text    |           |          | 
 event      | text    |           |          | 
 queryid    | bigint  |           |          | 

\d pg_wait_sampling_history
                 View "public.pg_wait_sampling_history"
   Column   |           Type           | Collation | Nullable | Default 
------------+--------------------------+-----------+----------+---------
 pid        | integer                  |           |          | 
 ts         | timestamp with time zone |           |          | 
 event_type | text                     |           |          | 
 event      | text                     |           |          | 
 queryid    | bigint                   |           |          | 

\d pg_wait_sampling_profile
        View "public.pg_wait_sampling_profile"
   Column   |  Type   | Collation | Nullable | Default 
------------+---------+-----------+----------+---------
 pid        | integer |           |          | 
 event_type | text    |           |          | 
 event      | text    |           |          | 
 queryid    | bigint  |           |          | 
 count      | bigint  |           |          | 

DROP EXTENSION pg_wait_sampling;