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ALTER TABLE .. SET ACCESS METHOD was not registering a dependency to the new access method with the relation altered in its rewrite phase, making possible the drop of an access method even if there are relations that depend on it. During the rewrite, a temporary relation is created to build the new relation files before swapping the new and old files, and, while the temporary relation was registering a correct dependency to the new AM, the old relation did not do that. A dependency on the access method is added when the relation files are swapped, which is the point where pg_class is updated. Materialized views and tables use the same code path, hence both were impacted. Backpatch down to 15, where this command has been introduced. Reported-by: Alexander Lakhin Reviewed-by: Nathan Bossart, Andres Freund Discussion: https://postgr.es/m/18000-9145c25b1af475ca@postgresql.org Backpatch-through: 15 |
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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/.