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Tom Lane 0ce7676aa0 Make xpath() do something useful with XPath expressions that return scalars. 
Previously, xpath() simply returned an empty array if the expression did
not yield a node set.  This is useless for expressions that return scalars,
such as one with name() at the top level.  Arrange to return the scalar
value as a single-element xml array, instead.  (String values will be
suitably escaped.)

This change will also cause xpath_exists() to return true, not false,
for such expressions.

Florian Pflug, reviewed by Radoslaw Smogura
2011-07-21 11:32:46 -04:00
config Adjust configure to use "+Olibmerrno" with HP-UX C compiler, if possible. 2011-05-26 17:29:33 -04:00
contrib In pg_upgrade, fix the -l/log option to work on Windows. 2011-07-20 18:31:03 -04:00
doc Make xpath() do something useful with XPath expressions that return scalars. 2011-07-21 11:32:46 -04:00
src Make xpath() do something useful with XPath expressions that return scalars. 2011-07-21 11:32:46 -04:00
.gitignore Add gitignore for mingw/cygwin build outputs 2011-06-09 18:11:47 +02:00
aclocal.m4 Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
configure Rewrite libxml error handling to be more robust. 2011-07-20 13:03:49 -04:00
configure.in Rewrite libxml error handling to be more robust. 2011-07-20 13:03:49 -04:00
COPYRIGHT Stamp copyrights for year 2011. 2011-01-01 13:18:15 -05:00
GNUmakefile.in Support "make check" in contrib 2011-04-25 22:27:11 +03:00
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 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/.