Re: Support loser tree for k-way merge

From: cca5507 <cca5507(at)qq(dot)com>
To: Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, pgsql-hackers <pgsql-hackers(at)lists(dot)postgresql(dot)org>
Subject: Re: Support loser tree for k-way merge
Date: 2025-12-03 13:18:57
Message-ID: tencent_E80D0FFA80C2AE21D4ABB0A7163EC54B0605@qq.com
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> So on specific data, the heap may be better than the loser tree. But I think the possibility
> is very small.

For example, a column contains all the same values, so the heap can always early return
when replacing top.

--
Regards,
ChangAo Chen

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