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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 |
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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/.