Horton

Fix setting next multixid's offset at offset wraparound

Heikki Linnakangas <heikki.linnakangas@iki.fi>

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Commit: b9a02b9780bc93afef4bc268212960dec2f9c88d
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2025-12-05T09:36:52Z
Releases: 15.16 
Fix setting next multixid's offset at offset wraparound

In commit 789d65364c, we started updating the next multixid's offset
too when recording a multixid, so that it can always be used to
calculate the number of members. I got it wrong at offset wraparound:
we need to skip over offset 0. Fix that.

Discussion: https://www.postgresql.org/message-id/d9996478-389a-4340-8735-bfad456b313c@iki.fi
Backpatch-through: 14

Files

PathChange+/−
src/backend/access/transam/multixact.c modified +7 −2

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