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Alexander Korotkov 91ce01a6e0 Revise GIN README 
We find GIN concurrency bugs from time to time.  One of the problems here is
that concurrency of GIN isn't well-documented in README.  So, it might be even
hard to distinguish design bugs from implementation bugs.

This commit revised concurrency section in GIN README providing more details.
Some examples are illustrated in ASCII art.

Also, this commit add the explanation of how is tuple layout in internal GIN
B-tree page different in comparison with nbtree.

Discussion: https://postgr.es/m/CAPpHfduXR_ywyaVN4%2BOYEGaw%3DcPLzWX6RxYLBncKw8de9vOkqw%40mail.gmail.com
Author: Alexander Korotkov
Reviewed-by: Peter Geoghegan
Backpatch-through: 9.4
2019-11-20 00:03:08 +03:00
config configure: Update python search order 2019-09-08 13:45:13 -04:00
contrib Handle arrays and ranges in pg_upgrade's test for non-upgradable types. 2019-11-13 11:35:37 -05:00
doc Doc: clarify use of RECURSIVE in WITH. 2019-11-19 14:43:37 -05:00
src Revise GIN README 2019-11-20 00:03:08 +03:00
.dir-locals.el Update Emacs configuration 2013-08-13 20:08:44 -04:00
.gitattributes gitattributes: Ignore time zone data files for whitespace checks 2014-07-22 00:12:28 -04:00
.gitignore Add /config.cache to .gitignore in back branches 2017-02-25 13:04:22 -05:00
aclocal.m4 Back-patch updated thread flags tests into 9.4 and 9.5. 2018-11-19 14:24:52 -05:00
configure Stamp 9.4.25. 2019-11-11 17:13:41 -05:00
configure.in Stamp 9.4.25. 2019-11-11 17:13:41 -05:00
COPYRIGHT Update copyright for 2019 2019-01-02 12:44:25 -05:00
GNUmakefile.in Add TAP tests for client programs 2014-04-14 21:33:46 -04:00
HISTORY Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
Makefile Fix non-GNU makefiles for AIX make. 2017-11-30 00:57:32 -08:00
README Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00
README.git Change documentation references to PG website to use https: not http: 2017-05-20 21:50:47 -04:00

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/.