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Tom Lane b898eb6367 Remove option to write USING before opclass name in CREATE INDEX. Dating back to commit `f10b63923`, our grammar has allowed "USING" to optionally appear before an opclass name in CREATE INDEX (and, lately, some related places such as ON CONFLICT specifications). Nikolay Shaplov noticed that this syntax existed but wasn't documented, and proposed documenting it. But what seems like a better idea is to remove the production, thereby making the code match the docs not vice versa. This isn't our usual modus operandi for such cases, but there are a couple of good reasons to proceed this way: * So far as I can find, this syntax has never been documented anywhere. It isn't relied on by any of our own code or test cases, and there seems little reason to suppose that it's been used in the wild either. * Documenting it would mean that there would be two separate uses of USING in the CREATE INDEX syntax, the other being "USING access_method". That can lead to nothing but confusion. So, let's just remove it. On the off chance that somebody somewhere is using it, this isn't something to back-patch, but we can fix it in HEAD. Discussion: <1593237.l7oKHRpxSe@nataraj-amd64>		2016-05-25 19:11:00 -04:00
config	Update config.guess and config.sub	2016-05-06 14:02:44 -04:00
contrib	Fix contrib/bloom to work for unlogged indexes.	2016-05-24 21:04:35 -04:00
doc	Update doc text to reflect new column in MVCC phenomena table.	2016-05-25 11:17:08 -05:00
src	Remove option to write USING before opclass name in CREATE INDEX.	2016-05-25 19:11:00 -04:00
.dir-locals.el	emacs: Set indent-tabs-mode in perl-mode	2015-04-12 23:53:23 -04:00
.gitattributes	Fix whitespace and remove obsolete gitattributes entry	2016-03-13 16:03:13 -04:00
.gitignore	Add .gitignore entries for AIX-specific intermediate build artifacts.	2015-07-08 20:44:22 -04:00
aclocal.m4	Replace our hacked version of ax_pthread.m4 with latest upstream version.	2015-07-08 20:36:06 +03:00
configure	Stamp 9.6beta1.	2016-05-09 16:47:49 -04:00
configure.in	Stamp 9.6beta1.	2016-05-09 16:47:49 -04:00
COPYRIGHT	Update copyright for 2016	2016-01-02 13:33:40 -05:00
GNUmakefile.in	Fix distclean/maintainer-clean targets to remove top-level tmp_install dir.	2015-05-13 18:48:05 -04:00
HISTORY	Improve text of stub HISTORY file.	2014-02-12 18:16:17 -05:00
Makefile	Allow make check in PL directories	2011-02-15 06:52:12 +02:00
README	Don't generate plain-text HISTORY and src/test/regress/README anymore.	2014-02-10 20:48:04 -05:00
README.git	Don't generate plain-text HISTORY and src/test/regress/README anymore.	2014-02-10 20:48:04 -05:00

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:

	http://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
http://www.postgresql.org/download/.  For more information look at our
web site located at http://www.postgresql.org/.