-----Original Message-----
From: dep...@depesz.com <dep...@depesz.com>
Sent: Friday, July 5, 2024 6:05 AM
To: Murthy Nunna <mnu...@fnal.gov>
Cc: pgsql-general@lists.postgresql.org
Subject: Re: psql help
[EXTERNAL] – This message is from an external sender
On Fri, Jul 05, 2024 at 03:54:56AM +0000, Murthy Nunna wrote:
> Sorry, there is no problem with the following statement and the environment
> variable. It works fine. But it terminates only one PID due to LIMIT 1. I
> want to terminate all pids that meet this criteria. If I remove LIMIT 1,
> pg_terminate_backend(pid) will not work as it expects only one pid at a time.
> So, the question is how to rewrite this psql so it loops through all pids one
> pid at a time? Thanks in advance for your help.
>
> SELECT pid, pg_terminate_backend(pid) FROM pg_stat_activity
> WHERE pid IN (select unnest(pg_blocking_pids(pid)) from pg_stat_activity
> where cardinality(pg_blocking_pids(pid)) > 0)
> and usename = 'DBUSER_10'
> and now() - state_change >= interval $a'${TIMEOUT_MINS}'$a
> order by now() - state_change >= interval
> $a'${TIMEOUT_MINS}'$a desc limit 1;
Did you try?
I don't see any reason why it wouldn't work with just 'limit 1' removed.
Best regards,
depesz
Thanks, depesz. I am pretty sure removing “limit 1” should terminate all pids
in the result set. I was just being dumb.
