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One code path related to this flavor of ALTER TABLE was checking that the relation to detach has to be a normal table or a partitioned table, which would fail if using the command with a different relation kind. Views, sequences and materialized views cannot be part of a partition tree, so these would cause the command to fail anyway, but the assertion was triggered. Foreign tables can be part of a partition tree, and again the assertion would have failed. The simplest solution is just to remove this assertion, so as we get the same failure as the non-concurrent code path. While on it, add a regression test in postgres_fdw for the concurrent partition detach of a foreign table, as per a suggestion from Alexander Lakhin. Issue introduced in 71f4c8c. Reported-by: Alexander Lakhin Author: Michael Paquier, Alexander Lakhin Reviewed-by: Peter Eisentraut, Kyotaro Horiguchi Discussion: https://postgr.es/m/17339-a9e09aaf38a3457a@postgresql.org 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/.