Re: Use merge-based matching for MCVs in eqjoinsel

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Ilia Evdokimov <ilya(dot)evdokimov(at)tantorlabs(dot)com>
Cc: PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Use merge-based matching for MCVs in eqjoinsel
Date: 2025-09-03 20:26:26
Message-ID: 903669.1756931186@sss.pgh.pa.us
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Ilia Evdokimov <ilya(dot)evdokimov(at)tantorlabs(dot)com> writes:
> I’ve attached v3 of the patch. This version adds a check for NULL values
> when comparing MCV entries, ensuring correctness in edge cases.

Um ... what edge cases would those be? We do not put NULL into
MCV arrays.

regards, tom lane

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