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An inplace update's invalidation messages are part of its transaction's commit record. However, the update survives even if its transaction aborts or we stop recovery before replaying its transaction commit. After recovery, a backend that started in recovery could update the row without incorporating the inplace update. That could result in a table with an index, yet relhasindex=f. That is a source of index corruption. This bulk invalidation avoids the functional consequences. A future change can fix the !RecoveryInProgress() scenario without changing the WAL format. Back-patch to v17 - v12 (all supported versions). v18 will instead add invalidations to WAL. Discussion: https://postgr.es/m/20240618152349.7f.nmisch@google.com
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. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download/ See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.