Fix BRIN 32-bit counter wrap issue with huge tables
authorDavid Rowley <drowley@postgresql.org>
Tue, 21 Oct 2025 07:46:14 +0000 (20:46 +1300)
committerDavid Rowley <drowley@postgresql.org>
Tue, 21 Oct 2025 07:46:14 +0000 (20:46 +1300)
commit9fd29d7ff476f3f1c1a22d6d6f730e813eddd960
treea0ecbe54d7e33f691c677fc1ef594d59b5759dab
parente4e496e88c9a0940abe1ade44337577b26f032a0
Fix BRIN 32-bit counter wrap issue with huge tables

A BlockNumber (32-bit) might not be large enough to add bo_pagesPerRange
to when the table contains close to 2^32 pages.  At worst, this could
result in a cancellable infinite loop during the BRIN index scan with
power-of-2 pagesPerRange, and slow (inefficient) BRIN index scans and
scanning of unneeded heap blocks for non power-of-2 pagesPerRange.

Backpatch to all supported versions.

Author: sunil s <sunilfeb26@gmail.com>
Reviewed-by: David Rowley <dgrowleyml@gmail.com>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://postgr.es/m/CAOG6S4-tGksTQhVzJM19NzLYAHusXsK2HmADPZzGQcfZABsvpA@mail.gmail.com
Backpatch-through: 13
src/backend/access/brin/brin.c