d3e5d89504
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 v14 - v17. This is a back-patch of commits: -8e7e672cda(main change, on master, before v18 branched) -8180136652(defect fix, on master, before v18 branched) It reverses commitbc6bad8857, my revert of the original back-patch. In v14, this also back-patches the assertion removal from commit7fcf2faf9c. Discussion: https://postgr.es/m/20240620012908.92.nmisch@google.com Backpatch-through: 14-17
PostgreSQL Database Management System
This directory contains the source code distribution of the PostgreSQL database management system.
PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/17/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/17/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.