From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | "Eric Thompson" <eric(dot)thompson(at)salliemae(dot)com> |
Cc: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: BUG #4721: All sub-tables incorrectly included in search plan for partitioned table |
Date: | 2009-03-21 05:44:00 |
Message-ID: | 15819.1237614240@sss.pgh.pa.us |
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Lists: | pgsql-bugs pgsql-hackers |
"Eric Thompson" <eric(dot)thompson(at)salliemae(dot)com> writes:
> test=# -- remove any irrelevant constraint from the master table, and now
> the date partitioning works
Hmm. Tracing through this, it seems your child tables have exactly 101
separate constraint clauses; removing one from the parent table gets it
down to 100. Which is where the cutoff installed by this patch is:
http://archives.postgresql.org/pgsql-committers/2008-11/msg00146.php
That patch was in response to this complaint:
http://archives.postgresql.org/pgsql-general/2008-11/msg00446.php
I'm not entirely sure about a better approach; just moving the cutoff
around doesn't seem like it will do anything except change who's
complaining...
regards, tom lane
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