amcheck: Distinguish interrupted page deletion from corruption.
This prevents false-positive reports about "the first child of leftmost
target page is not leftmost of its level", "block %u is not leftmost"
and "left link/right link pair". They appeared if amcheck ran before
VACUUM cleaned things, after a cluster exited recovery between the
first-stage and second-stage WAL records of a deletion. Back-patch to
v11 (all supported versions).
Reviewed by Peter Geoghegan.
Discussion: https://postgr.es/m/20231005025232.c7.nmisch@google.com
Branch
------
REL_11_STABLE
Details
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https://git.postgresql.org/pg/commitdiff/e04509f3246df6cfd96ff5a47f7facd459c72f2b
Modified Files
--------------
contrib/amcheck/verify_nbtree.c | 76 ++++++++++++++++++++++++++++++++++++++---
1 file changed, 72 insertions(+), 4 deletions(-)
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