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RelationReloadIndexInfo() is a fast-path used for index reloads in the relation cache, and it has always forgotten about updating indisreplident, which is something that would happen after an index is selected for a replica identity. This can lead to incorrect cache information provided when executing a command in a transaction context that updates indisreplident. None of the code paths currently on HEAD that need to check upon pg_index.indisreplident fetch its value from the relation cache, always relying on a fresh copy on the syscache. Unfortunately, this may not be the case of out-of-core code, that could see out-of-date value. Author: Shruthi Gowda Reviewed-by: Robert Haas, Dilip Kumar, Michael Paquier Discussion: https://postgr.es/m/CAASxf_PBcxax0wW-3gErUyftZ0XrCs3Lrpuhq4-Z3Fak1DoW7Q@mail.gmail.com Backpatch-through: 11
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/.