R: Problems with triggers and table lock

Hi guys,

thank you for everything.

Thanks for the queries, i ntocied the lock comes from here:
16389 | flashstart | 17409 | public | confs | 5646 | postgres | tuple | ExclusiveLock | t | 2
16389 | flashstart | 17409 | public | confs | 25659 | postgres | tuple | ExclusiveLock | f | 2

How can i see the origin of the problem?
The query is very simple, it is an update query.

Thank you again!
F

________________________________________
Da: Melvin Davidson [melvin6925(at)gmail(dot)com]
Inviato: sabato 2 dicembre 2017 16.22
A: Job
Cc: pgsql-general(at)postgresql(dot)org
Oggetto: Re: Problems with triggers and table lock

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