Fix BRIN 32-bit counter wrap issue with huge tables

David Rowley <drowley@postgresql.org>

Commit: 715983a81ac85a2d78ba1e2a7fe00bcf62f4ad3c
Author: David Rowley <drowley@postgresql.org>
Date: 2025-10-21T07:46:49Z
Releases: 18.1
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

Files

PathChange+/−
src/backend/access/brin/brin.c modified +5 −5

Discussion