From: tgl@postgresql.org
To: pgsql-committers@postgresql.org
Subject: pgsql: Teach simplify_boolean_equality to simplify the forms foo <> true
Date: Mon, 20 Jul 2009 00:24:31 +0000 (UTC)
Message-ID: <20090720002431.2060E75331E@cvs.postgresql.org> (raw)
Log Message:
-----------
Teach simplify_boolean_equality to simplify the forms foo <> true and
foo <> false, along with its previous duties of simplifying foo = true
and foo = false. (All of these are equivalent to just foo or NOT foo
as the case may be.) It's not clear how often this is really useful;
but it costs almost nothing to do, and it seems some people think we
should be smart about such cases. Per recent bug report.
Modified Files:
--------------
pgsql/src/backend/optimizer/util:
clauses.c (r1.277 -> r1.278)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/clauses.c?r1=1.277&r2=...)
pgsql/src/include/catalog:
pg_operator.h (r1.166 -> r1.167)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_operator.h?r1=1.166&r2=1.1...)
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To: pgsql-committers@postgresql.org
Cc: tgl@postgresql.org
Subject: Re: pgsql: Teach simplify_boolean_equality to simplify the forms foo <> true
In-Reply-To: <20090720002431.2060E75331E@cvs.postgresql.org>
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