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Phases 2 (building the new index) and 3 (validating the new index) checked for interrupts outside a transaction context, having as consequence to not release session-level locks taken on the parent relation and the old and new indexes processed. This could for example be triggered with statement_timeout and a bad timing, and would issue confusing error messages when shutting down the session still holding the locks (note that an assertion failure would be triggered first), on top of more issues with concurrent sessions trying to take a lock that would interfere with the SHARE UPDATE EXCLUSIVE locks hold here. This moves all the interruption checks inside a transaction context. Note that I have manually tested all interruptions to make sure that invalid indexes can be cleaned up properly. Partition indexes still have issues on their own with some missing dependency handling, which will be dealt with in a follow-up patch. Reported-by: Justin Pryzby Author: Michael Paquier Discussion: https://postgr.es/m/20191013025145.GC4475@telsasoft.com Backpatch-through: 12 |
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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/.