From: Joe Conway <mail@joeconway.com>
To: Richard Huxton <dev@archonet.com>
Cc: Michael Pohl <pgsql@newtopia.com>
Cc: pgsql-sql@postgresql.org, "George A.J" <jinujosein@yahoo.com>
Subject: Re: Which is faster SQL or PL/PGSQL
Date: Mon, 20 Oct 2003 10:24:19 -0700
Message-ID: <3F941A43.1040802@joeconway.com> (raw)
In-Reply-To: <200310201809.51830.dev@archonet.com>
References: <Pine.LNX.4.44.0310201119240.10378-100000@server1.techplant.com>
<200310201809.51830.dev@archonet.com>
Richard Huxton wrote:
> So - gain by not re-planning on every call, but maybe lose because your plan
> is not so precise.
>
> Of course, any queries you build dynamically and run via EXECUTE will have to
> be planned each time.
>
This question gets even more complex in 7.4, where many simple SQL
functions will get inlined, and library preloading is available to speed
that first PL/pgSQL call.
I think the best way to answer this question for any particular function
is to try it both ways (if the function *can* be written as a SQL
function) and see for yourself. And if you do this in 7.3, redo it when
you upgrade to 7.4.
HTH,
Joe
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To: pgsql-sql@postgresql.org
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Subject: Re: Which is faster SQL or PL/PGSQL
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