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Tom Lane 3db6524fe6 Mark some more I/O-conversion-invoking functions as stable not volatile. 
When written, textanycat, anytextcat, quote_literal, and quote_nullable
were marked volatile, because they could invoke arbitrary type-specific
output functions as part of casting their anyelement arguments to text.
Since then, we have defined a project policy that I/O functions must not
be volatile, as per commit aab353a60b.
So these functions can safely be downgraded to stable.  Most of the time
this makes no difference since they'll get inlined anyway, but as noted
by Andrew Dunstan, there are cases where the volatile marking prevents
optimizations that the planner does before function inlining.  (I think
I might have overlooked these functions in the earlier commit on the
grounds that inlining would make it moot, but not so --- tgl)

This change results in a change in the expected output of the json
regression tests, because the planner can now flatten a sub-select
that it failed to before.  The old output is preferable, but getting
that back will require some as-yet-unfinished work on RowExpr handling.

Marti Raudsepp
2012-02-08 11:29:29 -05:00
config Enable compiling with the mingw-w64 32 bit compiler. 2011-12-10 15:35:41 -05:00
contrib Add TIMING option to EXPLAIN, to allow eliminating of timing overhead. 2012-02-07 11:23:04 -05:00
doc Add opensp as a requirement for building the docs on Debian --- tested 2012-02-07 20:30:11 -05:00
src Mark some more I/O-conversion-invoking functions as stable not volatile. 2012-02-08 11:29:29 -05:00
.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 Support fls(). 2012-02-07 13:45:46 -05:00
configure.in Support fls(). 2012-02-07 13:45:46 -05:00
COPYRIGHT Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
GNUmakefile.in Build src/ before contrib/ in make world 2011-08-24 21:34:49 +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/.