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| author | Noah Misch <noah@leadboat.com> | 2024-10-25 06:51:03 -0700 |
|---|---|---|
| committer | Noah Misch <noah@leadboat.com> | 2024-10-25 06:51:07 -0700 |
| commit | 431e05181e4172415decf618ada8e91d6df995b1 (patch) | |
| tree | 1705d5ee990118e8ad3f9018223c7f34252042ab /src/tutorial/funcs.source | |
| parent | 4eac5a1fa78edde0de53a89bd2b06e1fe5588913 (diff) | |
| download | postgresql-431e05181e4172415decf618ada8e91d6df995b1.tar.gz postgresql-431e05181e4172415decf618ada8e91d6df995b1.zip | |
WAL-log inplace update before revealing it to other sessions.
A buffer lock won't stop a reader having already checked tuple
visibility. If a vac_update_datfrozenid() and then a crash happened
during inplace update of a relfrozenxid value, datfrozenxid could
overtake relfrozenxid. That could lead to "could not access status of
transaction" errors. Back-patch to v12 (all supported versions). In
v14 and earlier, this also back-patches the assertion removal from
commit 7fcf2faf9c7dd473208fd6d5565f88d7f733782b.
Discussion: https://postgr.es/m/20240620012908.92.nmisch@google.com
Diffstat (limited to 'src/tutorial/funcs.source')
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