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