Re: MergeJoin beats HashJoin in the case of multiple hash clauses

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Tender Wang <tndrwang(at)gmail(dot)com>
Cc: Alexander Korotkov <aekorotkov(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>, Andrei Lepikhov <lepihov(at)gmail(dot)com>
Subject: Re: MergeJoin beats HashJoin in the case of multiple hash clauses
Date: 2025-07-19 18:25:10
Message-ID: 73250.1752949510@sss.pgh.pa.us
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Tender Wang <tndrwang(at)gmail(dot)com> writes:
> Please take a look at the attached v3 patch.

This is of course not ever going to make any visible performance
difference. Still, the code is arguably clearer like this, and
I added some comments in hopes of improving it some more.
Pushed.

regards, tom lane

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