Fix limit block handling in pg_wal_summary_contents().
commitc8d5d6c78af4a55c5c36e2fa8e73d1f2b2e9d777
authorFujii Masao <fujii@postgresql.org>
Tue, 9 Jul 2024 00:26:54 +0000 (9 09:26 +0900)
committerFujii Masao <fujii@postgresql.org>
Tue, 9 Jul 2024 00:26:54 +0000 (9 09:26 +0900)
tree7422e2e8a1c6ea02c8ba78aa871d982883cfab7f
parent5a1e6df3b84c91957f80b19edb497a5eec83c403
Fix limit block handling in pg_wal_summary_contents().

Previously, pg_wal_summary_contents() had two issues,
causing discrepancies between pg_wal_summary_contents()
and the pg_walsummary command on the same WAL summary file:

(1) It did not emit the limit block when that's the only data for
     a particular relation fork.
(2) It emitted the same limit block multiple times if the list of
     block numbers was long enough.

This commit fixes these issues.

Backpatch to v17 where pg_wal_summary_contents() was added.

Author: Fujii Masao
Reviewed-by: Robert Haas
Discussion: https://postgr.es/m/90980ee6-2da6-42f6-a7b0-b7bae62ae279@oss.nttdata.com
src/backend/backup/walsummaryfuncs.c