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When a standby replays an XLOG_PARAMETER_CHANGE record that lowers wal_level below logical, we invalidate all logical slots in hot standby mode. However, if this record was replayed while not in hot standby mode, logical slots could remain valid even after promotion, potentially causing an assertion failure during WAL record decoding. To fix this issue, this commit adds a check for hot_standby status when restoring a logical replication slot on standbys. This check ensures that logical slots are invalidated when they become incompatible due to insufficient wal_level during recovery. Backpatch to v16 where logical decoding on standby was introduced. Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Bertrand Drouvot <bertranddrouvot.pg@gmail.com> Discussion: https://postgr.es/m/CAD21AoABoFwGY_Rh2aeE6tEq3HkJxf0c6UeOXn4VV9v6BAQPSw%40mail.gmail.com Backpatch-through: 16
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/.