From: Jim C. Nasby <jnasby@pervasive.com>
To: Craig A. James <cjames@modgraph-usa.com>
Cc: pgsql-performance@postgresql.org
Subject: Re: function not called if part of aggregate
Date: Sun, 11 Jun 2006 12:48:37 -0500
Message-ID: <20060611174837.GF34196@pervasive.com> (raw)
In-Reply-To: <448C505C.2080504@modgraph-usa.com>
References: <448C505C.2080504@modgraph-usa.com>
On Sun, Jun 11, 2006 at 10:18:20AM -0700, Craig A. James wrote:
> This doesn't seem right to me -- how can the optimizer possibly know that a
> function doesn't have a side effect, as in my case? Functions could do all
> sorts of things, such as logging activity, filling in other tables, etc,
> etc.
>
> Am I missing something here?
Read about function stability in the docs.
--
Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461
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To: pgsql-performance@postgresql.org
Cc: jnasby@pervasive.com, cjames@modgraph-usa.com
Subject: Re: function not called if part of aggregate
In-Reply-To: <20060611174837.GF34196@pervasive.com>
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