f46bee346c
pg_dump/restore failed to properly set the table access method for partitioned tables, as it relies on SET queries that would change default_table_access_method. However, SET affects only tables and materialized views, not partitioned tables which would always be restored with their pg_class.relam set to 0, losing their table AM set by either a CREATE TABLE .. USING or by a ALTER TABLE .. SET ACCESS METHOD. Appending a USING clause to the definition of CREATE TABLE is not possible as users may specify --no-table-access-method at restore or for a dump, meaning that the table AM portions may have to be skipped. Rather than SET, the solution used by this commit is to generate an extra ALTER TABLE .. SET ACCESS METHOD when restoring a partitioned table, based on the table AM set in its TOC entry. The choice of using a SET query or an ALTER TABLE query for a relation requires the addition of the relkind to the TOC entry to be able to choose between one or the other. Note that using ALTER TABLE SET ACCESS METHOD on a relation with physical storage would require a full rewrite, which would be costly for one. This also creates problems with binary upgrades where the rewrite would not be able to keep the OID of the relation consistent across the upgrade. This commit would normally require a protocol bump, but a45c78e3284b has already done one for this release cycle. Regression tests are adjusted with the new expected output, with some tweaks for the table AMs of the partitions to make the output more readable. Issue introduced by 374c7a229042, that has added support for table AMs in partitioned tables. Author: Michael Paquier Reviewed-by: Álvaro Herrera Discussion: https://postgr.es/m/Zh4JLSvvtQgBJZkZ@paquier.xyz
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.
Copyright and license information can be found in the file COPYRIGHT.
General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.