adjust the place of list_copy() call to reduce the overhead of function call and memory copies.

5704

Title

CI (CFBot)

Summary

Stats (from CFBot)

Patch version: v2, Patch count: 1, First patch: +2−1, All patches: +2−1

Topic

Miscellaneous

Tags

Performance

Created

2025-04-16 15:38:45

Last modified

2025-07-02 06:17:24 (yesterday)

Latest email

2025-07-03 09:48:38 (14 hours ago)

Status

PG19-1 (2025-07-01 - 2025-07-31): Needs review

Target version

Authors

Tender Wang (tndrwang)

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MergeJoin beats HashJoin in the case of multiple hash clauses: First at 2023-06-15 08:30:10 by Andrey Lepikhov <a.lepikhov at postgrespro.ru>
Latest at 2025-07-03 09:48:38 by Tender Wang <tndrwang at gmail.com>
Latest attachment (v2-0001-If-we-have-a-single-hashclause-list_copy-hashclau.patch) at 2025-07-03 02:02:03 from Tender Wang <tndrwang at gmail.com>
    Attachment (v2-0001-If-we-have-a-single-hashclause-list_copy-hashclau.patch) at 2025-07-03 02:02:03 from Tender Wang <tndrwang at gmail.com> (Patch: Yes)
    Attachment (0001-Adjust-the-place-of-list_copy-in-estimate_multivaria.patch) at 2025-04-14 06:17:17 from Tender Wang <tndrwang at gmail.com> (Patch: Yes)
    Attachment (v3-0001-Use-extended-stats-for-precise-estimation-of-buck.patch) at 2025-03-09 12:13:52 from Alexander Korotkov <aekorotkov at gmail.com> (Patch: Yes)
    Attachment (v3-0001-Use-extended-statistics-for-precise-estimation-of.patch) at 2025-03-03 08:24:40 from Andrei Lepikhov <lepihov at gmail.com> (Patch: Yes)
    Attachment (v2-0001-Use-extended-statistics-for-precise-estimation-of.patch) at 2025-02-17 00:34:26 from Alexander Korotkov <aekorotkov at gmail.com> (Patch: Yes)
    Attachment (v1-0001-Use-extended-statistics-for-precise-estimation-of.patch) at 2024-10-08 05:00:27 from Andrei Lepikhov <lepihov at gmail.com> (Patch: Yes)
    Attachment (0001-Use-extended-statistics-for-precise-estimation-of-bu.patch) at 2024-07-08 12:45:15 from Andrei Lepikhov <lepihov at gmail.com> (Patch: Yes)
    Attachment (fix_bucketsize_v2.diff) at 2023-09-11 08:04:22 from "Lepikhov Andrei" <a.lepikhov at postgrespro.ru> (Patch: Yes)
    Attachment (diff_estimate.diff) at 2023-06-28 13:53:06 from Alena Rybakina <lena.ribackina at yandex.ru> (Patch: Yes)
    Attachment (q2.sql) at 2023-06-15 08:30:10 from Andrey Lepikhov <a.lepikhov at postgrespro.ru> (Patch: No)

History

When	Who	What
2025-07-02 06:17:24	Tender Wang (tndrwang)	Changed tags to Performance
2025-04-16 15:38:46	Tender Wang (tndrwang)	Attached mail thread 52257607-57f6-850d-399a-ec33a654457b@postgrespro.ru
2025-04-16 15:38:45	Tender Wang (tndrwang)	Created patch record