At update of non-LP_NORMAL TID, fail instead of corrupting page header.
The right mix of DDL and VACUUM could corrupt a catalog page header such
that PageIsVerified() durably fails, requiring a restore from backup.
This affects only catalogs that both have a syscache and have DDL code
that uses syscache tuples to construct updates. One of the test
permutations shows a variant not yet fixed.
This makes !TransactionIdIsValid(TM_FailureData.xmax) possible with
TM_Deleted. I think core and PGXN are indifferent to that.
Per bug #17821 from Alexander Lakhin. Back-patch to v13 (all supported
versions). The test case is v17+, since it uses INJECTION_POINT.
Discussion: https://postgr.es/m/17821-dd8c334263399284@postgresql.org
Branch
------
REL_15_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/dc02b98bd1c8d653370fd8828063b1aee0b5b9eb
Modified Files
--------------
src/backend/access/heap/heapam.c | 45 +++++++++++++++++++++++++++++++++++++++-
src/include/access/tableam.h | 3 ++-
2 files changed, 46 insertions(+), 2 deletions(-)
