Horton

Simplify SortSupport for the macaddr data type

John Naylor <john.naylor@postgresql.org>

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Commit: 30229be755e703cf23fd73e95c5a515f9011cb5a
Author: John Naylor <john.naylor@postgresql.org>
Date: 2026-04-07T06:29:27Z
Releases: 19 (unreleased) 
Simplify SortSupport for the macaddr data type

As of commit 6aebedc38 Datums are 64-bit values. Since MAC addresses
have only 6 bytes, the abbreviated key always contains the entire
MAC address and is thus authoritative (for practical purposes -- the
tuple sort machinery has no way of knowing that). Abbreviating this
datatype is cheap, and aborting abbreviation prevents optimizations
like radix sort, so remove cardinality estimation.

Author: Aleksander Alekseev <aleksander@tigerdata.com>
Reviewed-by: Andrey Borodin <x4mmm@yandex-team.ru>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Suggested-by: John Naylor <johncnaylorls@gmail.com>
Discussion: https://postgr.es/m/CAJ7c6TMk10rF_LiMz6j9rRy1rqk-5s+wBPuBefLix4cY+-4s1w@mail.gmail.com

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src/backend/utils/adt/mac.c modified +6 −95

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