Tom Lane <tgl@xxxxxxxxxxxxx> writes: > Laurenz Albe <laurenz.albe@xxxxxxxxxxx> writes: > >> On Tue, 2020-01-07 at 14:58 +0530, Shrikant Bhende wrote: >>> I am trying to add a column to a table but it's not working, I have also tried >>> reindex and drop on the same table but those commands are also getting stuck. > >> There is a concurrent session which has an open transaction which >> holds some lock on the table in question. > > Yes, that looks like the cause. The pg_locks view could help you > find the culprit session. Yeah, and IMO the pg_blocking_pids($blocked-guys-pid) function is pretty snazzy too :-) > regards, tom lane > > > -- Jerry Sievers Postgres DBA/Development Consulting e: postgres.consulting@xxxxxxxxxxx
