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Robert Haas 001a573a20 Allow on-detach callbacks for dynamic shared memory segments. Just as backends must clean up their shared memory state (releasing lwlocks, buffer pins, etc.) before exiting, they must also perform any similar cleanups related to dynamic shared memory segments they have mapped before unmapping those segments. So add a mechanism to ensure that. Existing on_shmem_exit hooks include both "user level" cleanup such as transaction abort and removal of leftover temporary relations and also "low level" cleanup that forcibly released leftover shared memory resources. On-detach callbacks should run after the first group but before the second group, so create a new before_shmem_exit function for registering the early callbacks and keep on_shmem_exit for the regular callbacks. (An earlier draft of this patch added an additional argument to on_shmem_exit, but that had a much larger footprint and probably a substantially higher risk of breaking third party code for no real gain.) Patch by me, reviewed by KaiGai Kohei and Andres Freund.		2013-12-18 13:09:09 -05:00
config	Remove maintainer-check target, fold into normal build	2013-10-10 20:11:56 -04:00
contrib	Fix incorrect error message reported for non-existent users	2013-12-18 12:16:21 -05:00
doc	Add ALTER SYSTEM command to edit the server configuration file.	2013-12-18 23:42:44 +09:00
src	Allow on-detach callbacks for dynamic shared memory segments.	2013-12-18 13:09:09 -05:00
.dir-locals.el	Update Emacs configuration	2013-08-13 20:08:44 -04:00
.gitattributes	gitattributes: Make syntax compatible with older Git versions	2013-11-12 21:58:46 -05:00
.gitignore	Add *.pot to .gitignore	2013-10-19 10:56:52 -04:00
COPYRIGHT	Update copyrights for 2013	2013-01-01 17:15:01 -05:00
GNUmakefile.in	Remove maintainer-check target, fold into normal build	2013-10-10 20:11:56 -04:00
Makefile	Allow make check in PL directories	2011-02-15 06:52:12 +02:00
README	Remove useless whitespace at end of lines	2010-11-23 22:34:55 +02:00
README.git	Fix doc links in README file to work with new website layout	2013-11-12 12:53:32 +01:00
aclocal.m4	Remove cvs keywords from all files.	2010-09-20 22:08:53 +02:00
configure	configure: Allow adding a custom string to PG_VERSION	2013-12-12 22:01:27 -05:00
configure.in	configure: Allow adding a custom string to PG_VERSION	2013-12-12 22:01:27 -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.  Changes between all PostgreSQL releases are recorded in the
file HISTORY.  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/.