RE: psql help

-----Original Message-----
From: depesz@depesz.com <depesz@depesz.com>
Sent: Friday, July 5, 2024 6:05 AM
To: Murthy Nunna <mnunna@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.