pg_locks.relation question - Mailing list pgsql-general

From Daniel Westermann
Subject pg_locks.relation question
Date
Msg-id 1717499812.27146.1524053137683.JavaMail.zimbra@dbi-services.com
Whole thread Raw
Responses Re: pg_locks.relation question
List pgsql-general
Hi,

session one:

locks=# begin;
BEGIN
locks=# alter table test add column b text;
ALTER TABLE
locks=#

Session 2 querying pg_locks for the PID from above:

locks=# select locktype,relation::regclass,mode from pg_locks where pid = 2026 and locktype = 'relation';
 locktype | relation |        mode        
----------+----------+---------------------
 relation | test     | AccessExclusiveLock
 relation | 17728    | AccessExclusiveLock
 relation | 17726    | ShareLock
(3 rows)

What are these 17728 and 17726 OIDs? Nothing else is happening except these two sessions.

Thanks in advance
Daniel

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