hashjoins vs. Bloom filters

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ID 6818
Title hashjoins vs. Bloom filters
CI (CFBot) Summary
Stats (from CFBot) Patch version: v4, Patch count: 4, First patch: +2312−240, All patches: +4088−487
Tags Performance
Created 2026-05-30 01:02:06
Last modified 2026-05-30 01:02:07 (1 month ago)
Latest email 2026-07-07 22:26:41 (4 days ago)
Status
PG20-1 (2026-07-01 – 2026-07-31): Needs review
Target version
Authors Tomas Vondra (fuzzycz)
Reviewers Become reviewer
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hashjoins vs. Bloom filters (yet again)
First at 2026-05-30 00:55:43 by Tomas Vondra <tomas at vondra.me>
Latest at 2026-07-07 22:26:41 by Tomas Vondra <tomas at vondra.me>
Latest attachment (v4-0001-PoC-hashjoin-bloom-filter-pushdown.patch) at 2026-07-02 20:31:18 from "Matheus Alcantara" <matheusssilv97 at gmail.com>
    Attachment (v4-0001-PoC-hashjoin-bloom-filter-pushdown.patch) at 2026-07-02 20:31:18 from "Matheus Alcantara" <matheusssilv97 at gmail.com> (Patch: No)
    Attachment (v3-0001-PoC-hashjoin-bloom-filter-pushdown.patch) at 2026-07-01 13:25:25 from Tomas Vondra <tomas at vondra.me> (Patch: No)
    Attachment (v2-0002-Using-Bloom-filters-for-parallel-hash-joins.patch) at 2026-06-02 15:22:36 from Tomas Vondra <tomas at vondra.me> (Patch: Yes)
    Attachment (0001-Allow-a-CustomScan-to-receive-a-pushed-down-hashjoin.patch.text) at 2026-05-31 15:03:47 from Andrew Dunstan <andrew at dunslane.net> (Patch: Yes)
    Attachment (hashjoin-bloom-filter.pdf) at 2026-05-30 00:55:43 from Tomas Vondra <tomas at vondra.me> (Patch: No)
History
When Who What
2026-05-30 01:02:07 Tomas Vondra (fuzzycz) Attached mail thread 5cd8c20c-14b5-4b0d-bedc-69bf714e87eb@vondra.me
2026-05-30 01:02:06 Tomas Vondra (fuzzycz) Created patch record
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