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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 Unfortunately, this may not be the case of out-of-core code, that could see out-of-date value.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