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Check `PiecewiseMergeJoin` performance for large tables #18221

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on Oct 22, 2025

Describe the bug

For the case where we are comparing large tables, PiecewiseMergeJoin seems to perform slower than the Nested Loop Join.

Once fixed, the comment in #18209 can be removed.

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jonathanc-n
added the
Bug
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jonathanc-n
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bugSomething isn't working
on Oct 22, 2025
jonathanc-n commented on Oct 23, 2025
jonathanc-n
on Oct 23, 2025
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jonathanc-n
on Oct 23, 2025
comphead
closed this as completedin #25840 on Oct 10, 2026
cyberbeam524
added a commit that references this issue on Oct 11, 2026
perf(pwmj):settle never-matching streamed rows against the buffered e…
aaf5df1
Omega359
added a commit that references this issue on Oct 11, 2026
perf(pwmj):settle never-matching streamed rows against the buffered e…
9bc5cd9
adriangb
added a commit that references this issue on Oct 14, 2026
bench: classic pwmj sql benchmark (apache#25839)
0eb098a

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