mirror/postgresql
2
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2025-02-17 19:30:00 +08:00
Code Issues Packages Projects Releases Wiki Activity
30,703 Commits 37 Branches 643 Tags 457 MiB
C 85.4%
PLpgSQL 6%
Perl 4.2%
Yacc 1.3%
Makefile 0.7%
Other 2.2%
947d0c862c
Go to file
Tom Lane 947d0c862c Use appendrel planning logic for top-level UNION ALL structures. 
Formerly, we could convert a UNION ALL structure inside a subquery-in-FROM
into an appendrel, as a side effect of pulling up the subquery into its
parent; but top-level UNION ALL always caused use of plan_set_operations().
That didn't matter too much because you got an Append-based plan either
way.  However, now that the appendrel code can do things with MergeAppend,
it's worthwhile to hack up the top-level case so it also uses appendrels.

This is a bit of a stopgap; but going much further than this will require
a major rewrite of the planner's set-operations support, which I'm not
prepared to undertake now.  For the moment let's grab the low-hanging fruit.
2010-11-08 15:15:02 -05:00
config find -path is not portable, so use grep -v instead. 2010-10-25 10:04:00 -03:00
contrib Allow moddatetime's target column to be of type timestamptz. 2010-11-04 16:34:47 -04:00
doc Prevent invoking I/O conversion casts via functional/attribute notation. 2010-11-07 13:03:19 -05:00
src Use appendrel planning logic for top-level UNION ALL structures. 2010-11-08 15:15:02 -05:00
.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 Add/fix caching on some configure checks 2010-09-29 22:38:04 +03:00
configure.in Add/fix caching on some configure checks 2010-09-29 22:38:04 +03:00
COPYRIGHT
GNUmakefile.in Print a make warning when using GNU make older than 3.80 2010-11-03 17:33:04 +02:00
Makefile
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/.