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As introduced by f9900df5f94, a REINDEX CONCURRENTLY job done for an index with predicates or expressions would set PROC_IN_SAFE_IC in its MyProc->statusFlags, causing it to be ignored by other concurrent operations. Such concurrent index rebuilds should never be ignored, as a predicate or an expression could call a user-defined function that accesses a different table than the table where the index is rebuilt. A test that uses injection points is added, backpatched down to 17. Michail has proposed a different test, but I have added something simpler with more coverage. Oversight in f9900df5f949. Author: Michail Nikolaev Discussion: https://postgr.es/m/CANtu0oj9A3kZVduFTG0vrmGnKB+DCHgEpzOp0qAyOgmks84j0w@mail.gmail.com Backpatch-through: 14
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/.