From: Tom Lane <tgl@sss.pgh.pa.us>
To: Pavel Hlavnicka <pavel@gingerall.cz>
Cc: pgsql-sql@postgresql.org
Subject: Re: calculated expressions and index use
Date: Thu, 30 Jan 2003 11:51:25 -0500
Message-ID: <20100.1043945485@sss.pgh.pa.us> (raw)
In-Reply-To: <3E394AA6.8080400@gingerall.cz>
References: <3E394AA6.8080400@gingerall.cz>
Pavel Hlavnicka <pavel@gingerall.cz> writes:
> select * from foo
> where created_at >= 'now'::timestamp - '1 hour'::interval;
> My table is indexed on created_at field. The query above doesn't use it,
What's your PG version? In 7.2 and later that expression will be folded
to a constant.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, pavel@gingerall.cz
Subject: Re: calculated expressions and index use
In-Reply-To: <20100.1043945485@sss.pgh.pa.us>
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