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From: Tom Lane <tgl@sss.pgh.pa.us>
To: Andres Freund <andres@anarazel.de>
Cc: Heikki Linnakangas <hlinnaka@iki.fi>
Cc: Tomas Vondra <tomas.vondra@2ndquadrant.com>
Cc: pgsql-hackers@postgresql.org
Subject: Re: WIP: Faster Expression Processing v4
Date: Thu, 23 Mar 2017 13:14:59 -0400
Message-ID: <28270.1490289299@sss.pgh.pa.us> (raw)
In-Reply-To: <31922.1490194838@sss.pgh.pa.us>
References: <20170307030137.lpo4japv5oqgbqpz@alap3.anarazel.de>
	<2090fd00-4dec-7b42-f700-64308958504c@2ndquadrant.com>
	<20170313080351.4g5oubxcj4xj5y7t@alap3.anarazel.de>
	<fcdaa51b-e905-72e0-39dd-5e22f535a253@2ndquadrant.com>
	<20170314065259.ffef4tfhgbsaieoe@alap3.anarazel.de>
	<69b7bb0e-8dab-3d39-1a89-3c6ab6409f64@iki.fi>
	<20170314224706.nxvtapenky6eom3z@alap3.anarazel.de>
	<13062.1489622943@sss.pgh.pa.us>
	<20170320062511.hp5qeurtxrwsvfxr@alap3.anarazel.de>
	<31150.1490193666@sss.pgh.pa.us>
	<20170322145240.vt2iolwt6vpmx33z@alap3.anarazel.de>
	<31922.1490194838@sss.pgh.pa.us>
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Looking at some of the coding choices you made here, I see that you're
making a hard assumption that called functions never scribble on their
fcinfo->arg/argnull arrays.  I do not believe that we've ever had such
an assumption before.  Are we comfortable with that?  If so, we'd
better document it.

			regards, tom lane


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