Fujii Masao
64797ad97d
Commit16a0039dc0reduced the lock level for ALTER DOMAIN ... VALIDATE CONSTRAINT from ShareLock to ShareUpdateExclusiveLock. However, that change was unsafe. If DML on tables using the domain had already started and initialized domain constraint checks before a NOT VALID constraint was added, it could still insert or update rows that violated the new constraint. This commit reverts commit16a0039dc0so that ALTER DOMAIN ... VALIDATE CONSTRAINT once again acquires ShareLock on relations using the domain. Also add an isolation test covering this case. Author: Chao Li <lic@highgo.com> Reviewed-by: Fujii Masao <masao.fujii@gmail.com> Reviewed-by: Álvaro Herrera <alvherre@kurilemu.de> Discussion: https://postgr.es/m/463C0E1A-4A40-4BCA-839C-9236B80D65EE@gmail.com
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/.