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help / color / mirror / Atom feedFrom: David Rowley <[email protected]>
To: Tom Lane <[email protected]>
Cc: Richard Guo <[email protected]>
Cc: nikhil raj <[email protected]>
Cc: [email protected]
Subject: Re: Significant Execution Time Difference Between PG13.14 and PG16.4 for Query on information_schema Tables.
Date: Wed, 28 Aug 2024 11:57:53 +1200
Message-ID: <CAApHDvr2v7iwMUsCQKxUPSSzTGuBOx1_e0hyEA8VLy1or35JVA@mail.gmail.com> (raw)
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On Wed, 28 Aug 2024 at 11:37, Tom Lane <[email protected]> wrote:
> Oh, scratch that, I see you mean this is an additional way to do it
> not the only way to do it. But I'm confused why it works for
> t1.two+1 AS c1
> but not
> t1.two+t2.two AS c1
> Those ought to look pretty much the same for this purpose.
The bms_overlap(pull_varnos(rcon->root, newnode), rcon->relids) test
is false with t1.two+1. Looks like there needs to be a Var from t2
for the bms_overlap to be true
David
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To: [email protected]
Cc: [email protected], [email protected], [email protected], [email protected], [email protected]
Subject: Re: Significant Execution Time Difference Between PG13.14 and PG16.4 for Query on information_schema Tables.
In-Reply-To: <CAApHDvr2v7iwMUsCQKxUPSSzTGuBOx1_e0hyEA8VLy1or35JVA@mail.gmail.com>
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