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Tom Lane 2865d5952d Don't assume a subquery's output is unique if there's a SRF in its tlist. 
While the x output of "select x from t group by x" can be presumed unique,
this does not hold for "select x, generate_series(1,10) from t group by x",
because we may expand the set-returning function after the grouping step.
(Perhaps that should be re-thought; but considering all the other oddities
involved with SRFs in targetlists, it seems unlikely we'll change it.)
Put a check in query_is_distinct_for() so it's not fooled by such cases.

Back-patch to all supported branches.

David Rowley
2014-07-08 14:03:30 -04:00
config Accept tcl 8.6 in configure's probe for tclsh. 2014-05-10 10:48:14 -04:00
contrib Fix inadequately-sized output buffer in contrib/unaccent. 2014-07-01 11:23:01 -04:00
doc Remove obsolete example of CSV log file name from log_filename document. 2014-06-26 14:30:11 +09:00
src Don't assume a subquery's output is unique if there's a SRF in its tlist. 2014-07-08 14:03:30 -04:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:06 +02:00
aclocal.m4
configure Add mkdtemp() to libpgport. 2014-06-14 09:41:18 -04:00
configure.in Add mkdtemp() to libpgport. 2014-06-14 09:41:18 -04:00
COPYRIGHT Update copyright for 2014 2014-01-07 16:05:29 -05:00
GNUmakefile.in Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:27 -05:00
HISTORY Improve text of stub HISTORY file. 2014-02-12 18:16:41 -05:00
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 Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:27 -05:00
README.git Don't generate plain-text HISTORY and src/test/regress/README anymore. 2014-02-10 20:48:27 -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.  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/.