Re: truncate partitioned table locking

I have a situation where data is constantly inserted and frequently
queried into a master table(and routed appropriately to the partition
based on a non-overlapping check constraint ). I also need to drop the
child partition (say for yesterday's data..the partitioning is done on a
daily basis).

How can I issue a truncate /drop table on the child without running into
locking issues. Doesn't constraint exclusion prevent access of a child
table based on the check constraint criteria

-----Original Message-----
From: Tom Lane [mailto:tgl(at)sss(dot)pgh(dot)pa(dot)us]
Sent: Monday, June 19, 2006 11:27 AM
To: Sriram Dandapani
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: [ADMIN] truncate partitioned table locking

"Sriram Dandapani" <sdandapani(at)counterpane(dot)com> writes:
> I have master table A, inherited by Table B and Table C

> Does the truncation of a child table take a lock on the master table ?

No, but it certainly locks the child table ... and queries on A are
going to try to scan all three tables.

regards, tom lane