pg_stat_get_backend_xact_start()
A function returning the backend's current transaction start time
pg_stat_get_backend_xact_start() is a system function returning the start time of the current transaction in the specified backend.
pg_stat_get_backend_xact_start() was added in PostgreSQL 8.3.
Usage
pg_stat_get_backend_xact_start (integer) →timestamp with time zone
The backend is specified by a backend ID number reported by pg_stat_get_backend_idset(); see below for an execution example.
The value returned by pg_stat_get_backend_xact_start() corresponds to the column xact_start in pg_stat_activity.
Related functions
The following related functions are also available:
pg_stat_get_backend_activity()pg_stat_get_backend_activity_start()pg_stat_get_backend_client_addr()pg_stat_get_backend_client_port()pg_stat_get_backend_dbid()pg_stat_get_backend_pid()pg_stat_get_backend_start()pg_stat_get_backend_userid()pg_stat_get_backend_wait_event()pg_stat_get_backend_wait_event_type()
Change history
- PostgreSQL 8.3
- added (commit 886a02d1)
Examples
Basic usage example for pg_stat_get_backend_xact_start():
postgres=# SELECT pg_stat_get_backend_pid(s.backendid) AS pid,
pg_stat_get_backend_xact_start(s.backendid) AS backend_start
FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s;
pid | backend_start
---------+-------------------------------
1451980 |
1451982 |
2382558 | 2021-07-21 14:19:15.932239+02
1764534 |
1451978 |
1451977 |
1451979 |
(7 rows)
References
- PostgreSQL documentation: Per-Backend Statistics Functions