Re: Reduce "Var IS [NOT] NULL" quals during constant folding

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Robert Haas <robertmhaas(at)gmail(dot)com>
Cc: Richard Guo <guofenglinux(at)gmail(dot)com>, David Rowley <dgrowleyml(at)gmail(dot)com>, Tender Wang <tndrwang(at)gmail(dot)com>, Pg Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Reduce "Var IS [NOT] NULL" quals during constant folding
Date: 2025-04-10 20:33:57
Message-ID: 606734.1744317237@sss.pgh.pa.us
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Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> It's not quite the same complaint, because the earlier complaint was
> that it was actually being done at parse time, and this complaint is
> that it is scribbling on a parse-time data structure.

Ah, right. But that's still not the direction we want to be
going in [1].

regards, tom lane

[1] https://www.postgresql.org/message-id/2531459.1743871597%40sss.pgh.pa.us

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