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Tom Lane 305cf1fd72 Fix AggGetAggref() so it won't lie to aggregate final functions. If we merge the transition calculations for two different aggregates, it's reasonable to assume that the transition function should not care which of those Aggref structs it gets from AggGetAggref(). It is not reasonable to make the same assumption about an aggregate final function, however. Commit `804163bc2` broke this, as it will pass whichever Aggref was first associated with the transition state in both cases. This doesn't create an observable bug so far as the core system is concerned, because the only existing uses of AggGetAggref() are in ordered-set aggregates that happen to not pay attention to anything but the input properties of the Aggref; and besides that, we disabled sharing of transition calculations for OSAs yesterday. Nonetheless, if some third-party code were using AggGetAggref() in a normal aggregate, they would be entitled to call this a bug. Hence, back-patch the fix to 9.6 where the problem was introduced. In passing, improve some of the comments about transition state sharing. Discussion: https://postgr.es/m/CAB4ELO5RZhOamuT9Xsf72ozbenDLLXZKSk07FiSVsuJNZB861A@mail.gmail.com		2017-10-12 15:20:16 -04:00
config	Extend & revamp pg_bswap.h infrastructure.	2017-09-29 17:24:39 -07:00
contrib	Replace remaining uses of pq_sendint with pq_sendint{8,16,32}.	2017-10-11 21:00:46 -07:00
doc	Doc: fix typo in release notes.	2017-10-12 11:36:14 -04:00
src	Fix AggGetAggref() so it won't lie to aggregate final functions.	2017-10-12 15:20:16 -04:00
.dir-locals.el	emacs: Set indent-tabs-mode in perl-mode	2015-04-12 23:53:23 -04:00
.gitattributes	Remove contrib/tsearch2.	2017-02-13 11:06:11 -05:00
.gitignore	Add lcov --initial	2017-09-29 08:54:34 -04:00
COPYRIGHT	Update copyright for 2017	2017-01-03 12:37:53 -05:00
GNUmakefile.in	Have "make coverage" recurse into contrib as well	2016-09-05 18:44:36 -03:00
HISTORY	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00
Makefile	Prevent passing down MAKELEVEL/MAKEFLAGS from non-GNU make to GNU make.	2017-08-09 12:05:53 -04:00
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
aclocal.m4	Make configure check for IPC::Run when --enable-tap-tests is specified.	2017-06-15 15:56:12 -04:00
configure	Add configure infrastructure to detect support for C99's restrict.	2017-10-11 16:01:52 -07:00
configure.in	Add configure infrastructure to detect support for C99's restrict.	2017-10-11 16:01:52 -07:00

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/.