From: T.H. <calinet6@gmail.com>
To: pgsql-performance@postgresql.org
Subject: Re: Question about subselect/IN performance
Date: Tue, 30 Nov 2010 18:23:56 -0500
Message-ID: <id412b$1le5$1@news.hub.org> (raw)
In-Reply-To: <4CF52C5F0200002500037FBA@gw.wicourts.gov>
References: <id3d3s$c8s$1@news.hub.org>
<4CF52C5F0200002500037FBA@gw.wicourts.gov>
On 11/30/10 5:54 PM, Kevin Grittner wrote:
> "T.H."<calinet6@gmail.com> wrote:
>
>> Also, are there any better ways you can think of doing such an IN
>> query, using non-subselect means that might be more efficient?
>
> Have you tried the EXISTS predicate?
>
> -Kevin
>
Just looking into it now, thanks for the suggestion. Is there a reason
that EXISTS is generally faster than IN for this sort of query?
-Tristan
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To: pgsql-performance@postgresql.org
Cc: calinet6@gmail.com
Subject: Re: Question about subselect/IN performance
In-Reply-To: <id412b$1le5$1@news.hub.org>
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