Re: Problems with triggers and table lock

On Fri, Dec 1, 2017 at 4:39 PM, Job <Job(at)colliniconsulting(dot)it> wrote:

> Dear guys,
>
> we are using Postgresql 9.6.1 with Rubyrep in order to replicate some
> tables across two different, and remote, database servers.
> Since few weeks sometimes when inserting/updating some rows, the statement
> remains waiting and table seems locked for insert/updates.
>
> When i issue "select * from pg_stat_activity" no query is locked.
> I only obtain this error messages when i kill (i also try directly from
> bash with pgsql) with "ctrl+c" the locked insert:
>
> ERROR: canceling statement due to user request
> CONTEXT: while updating tuple (0,7) in relation "TABLE"
> SQL statement "UPDATE TABLE SET FIELD=NOW() WHERE FIELD IS NULL"
> PL/pgSQL function TRIGGER_NAME() line 3 at SQL statement
>
> How can i see what is locking my table/tables?
>
> Thank you!
> F
>

>How can i see what is locking my table/tables?

The attached query will give you all the necessary info.

--
*Melvin Davidson*
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.