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Tom Lane 660fbec560 Prevent show_session_authorization from crashing when session_authorization 
hasn't been set.

The only known case where this can happen is when show_session_authorization
is invoked in an autovacuum process, which is possible if an index function
calls it, as for example in bug #5669 from Andrew Geery.  We could perhaps
try to return a sensible value, such as the name of the cluster-owning
superuser; but that seems like much more trouble than the case is worth,
and in any case it could create new possible failure modes.  Simply
returning an empty string seems like the most appropriate fix.

Back-patch to all supported versions, even those before autovacuum, just
in case there's another way to provoke this crash.
2010-09-23 16:53:16 -04:00
config Fix remaining stray references to CVS. 2010-09-22 19:51:39 -04:00
contrib Some more gitignore cleanups: cover contrib and PL regression test outputs. 2010-09-22 17:22:40 -04:00
doc Fix inconsistent capitalization of "PL/pgSQL". 2010-09-22 21:57:37 -04:00
src Prevent show_session_authorization from crashing when session_authorization 2010-09-23 16:53:16 -04:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
aclocal.m4 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
configure Fix remaining stray references to CVS. 2010-09-22 19:51:39 -04:00
configure.in Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
COPYRIGHT Update copyright for the year 2010. 2010-01-02 16:58:17 +00:00
GNUmakefile.in Rename README.CVS to README.git and change references in it. 2010-09-21 12:40:16 +02:00
Makefile Add new make targets "world", "install-world" and "installcheck-world" to build, install and check just about everything. 2010-01-28 23:59:52 +00:00
README Remove extra newlines at end and beginning of files, add missing newlines 2010-08-19 05:57:36 +00:00
README.git Trivial typo fix. 2010-09-21 14:16:00 -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:

	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/.