From: Tom Lane <tgl@sss.pgh.pa.us>
To: Richard Huxton <dev@archonet.com>
Cc: alvarezp@alvarezp.ods.org
Cc: pgsql-performance@postgresql.org
Subject: Re: Seq scan on zero-parameters function
Date: Fri, 06 Feb 2004 09:55:28 -0500
Message-ID: <29560.1076079328@sss.pgh.pa.us> (raw)
In-Reply-To: <200402060850.50818.dev@archonet.com>
References: <4207.192.168.0.64.1076051944.squirrel@alvarezp.ods.org>
<200402060850.50818.dev@archonet.com>
Richard Huxton <dev@archonet.com> writes:
> It's not entirely clear to me why this form is different from the other form
> though.
The code that checks for expressions containing unstable functions
doesn't look inside sub-selects. Arguably this is a bug, but people
were relying on that behavior way back before we had these nice
STABLE/IMMUTABLE tags for functions. I'm hesitant to change it for
fear of breaking people's apps.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, dev@archonet.com, alvarezp@alvarezp.ods.org, pgsql-performance@postgresql.org
Subject: Re: Seq scan on zero-parameters function
In-Reply-To: <29560.1076079328@sss.pgh.pa.us>
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