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pgsql: Fix set_joinrel_size_estimates() to estimate outer-join sizes
- From: tgl(at)postgresql(dot)org (Tom Lane)
- To: pgsql-committers(at)postgresql(dot)org
- Subject: pgsql: Fix set_joinrel_size_estimates() to estimate outer-join sizes
- Date: Thu, 9 Nov 2006 21:21:41 -0400 (AST)
- Message-id: <20061110012141.56D7E9FB256@postgresql.org> <text/plain>
Log Message:
-----------
Fix set_joinrel_size_estimates() to estimate outer-join sizes more
accurately: we have to distinguish the effects of the join's own ON
clauses from the effects of pushed-down clauses. Failing to do so
was a quick hack long ago, but it's time to be smarter. Per example
from Thomas H.
Modified Files:
--------------
pgsql/src/backend/optimizer/path:
costsize.c (r1.167 -> r1.168)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/costsize.c.diff?r1=1.167&r2=1.168)
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