Re: CREATE OR REPLACE FUNCTION statement just sitting there

On 11/06/2018 05:34 AM, Alvaro Herrera wrote:

On 2018-Nov-05, Ron wrote:

That (plus pg_locks)  is the heart of the "list all blocking queries"
statement I copied from https://wiki.postgresql.org/wiki/Lock_Monitoring.

On that page there's a note about 9.6.  Did you see the referenced
commit
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commit;h=52f5d578d6c29bf254e93c69043b817d4047ca67
?  Maybe see about using the "pg_blocking_pids(int) returns int[]"
function instead.

I did see it, but the https://wiki.postgresql.org/wiki/Lock_Monitoring query seems to work (seeing that it regularly shows locks).

Is this query from https://stackoverflow.com/a/43363536/1543618  adequate to the task?

select pid,       usename,       pg_blocking_pids(pid) as blocked_by,       query as blocked_query
from pg_stat_activity
where cardinality(pg_blocking_pids(pid)) > 0;