pgsql-server/src backend/nodes/outfuncs.c back ...

From: tgl(at)svr1(dot)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql-server/src backend/nodes/outfuncs.c back ...
Date: 2004-01-05 18:04:39
Message-ID: 20040105180439.B6FF1D1B479@svr1.postgresql.org
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CVSROOT: /cvsroot
Module name: pgsql-server
Changes by: tgl(at)svr1(dot)postgresql(dot)org 04/01/05 14:04:39

Modified files:
src/backend/nodes: outfuncs.c
src/backend/optimizer/plan: createplan.c
src/backend/optimizer/util: clauses.c pathnode.c
src/include/nodes: relation.h
src/include/optimizer: clauses.h

Log message:
Improve UniquePath logic to detect the case where the input is already
known unique (eg, it is a SELECT DISTINCT ... subquery), and not do a
redundant unique-ification step.

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