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Michael Paquier 43351557d0 Make materialized views participate in predicate locking 
Matviews have been discarded from needing predicate locks since 3bf3ab8
and their introduction.  At this point, there was no concurrent flavor
of REFRESH yet, hence there was no meaning in having materialized views
look at read/write conflicts with concurrent transactions using
themselves the serializable isolation level because they could only be
refreshed with an access exclusive lock.  CONCURRENTLY, on the contrary,
allows reads and writes during a refresh as it holds a share update
exclusive lock.

Some isolation tests are added to show the effect of the change, with a
combination of one table and a matview based on it, using a mix of
REFRESH CONCURRENTLY and read/write queries.

This could arguably be considered as a bug, but as it is a subtle
behavior change potentially impacting applications no backpatch is
done.

Author: Yugo Nagata
Reviewed-by: Richard Guo, Dilip Kumar, Michael Paquier
Discussion: https://postgr.es/m/20220726164434.42d4e33911b4b4fcf751c4e7@sraoss.co.jp
2022-12-01 15:41:13 +09:00
config meson: Add initial version of meson based build system 2022-09-21 22:37:17 -07:00
contrib Stop accessing checkAsUser via RTE in some cases 2022-11-30 12:07:03 +01:00
doc doc: add transaction processing chapter with internals info 2022-11-29 20:49:52 -05:00
src Make materialized views participate in predicate locking 2022-12-01 15:41:13 +09:00
.cirrus.yml ci: Use -fsanitize=undefined,alignment,address in linux tasks 2022-11-21 15:13:09 -08:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
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configure Make finding openssl program a configure or meson option 2022-10-20 21:05:42 +02:00
configure.ac Make finding openssl program a configure or meson option 2022-10-20 21:05:42 +02:00
COPYRIGHT Update copyright for 2022 2022-01-07 19:04:57 -05:00
GNUmakefile.in Remove temporary portlock directory during make [dist]clean. 2022-11-26 10:30:31 -05:00
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README.git Canonicalize some URLs 2020-02-10 20:47:50 +01:00

README 

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/.