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Bruce Momjian 70f5a87ecc Small patch that adds some documentation for the area() function. 
Specifically, point out that intersecting points in a path will yield
(most likely), unexpected results.  Visually these are identical paths,
but mathematically they're not the same.  Ex:

  area |                                           plan
------
+-----------------------------------------------------------------------
-------------------
    -0 | ((0,0),(0,1),(2,1),(2,2),(1,2),(1,0),(0,0))
     2 | ((0,0),(0,1),(1,1),(1,2),(2,2),(2,1),(1,1),(1,0),(0,0))

The current algorithm for area(PATH) is very quick, but only handles
non-intersecting paths.  I'm going to work on two other functions for
the PATH data type that determines if a PATH is intersecting or not,
and a function that returns the area() for an intersecting PATH.  The
intersecting area() function will be considerably slower (I think it's
going to be O(n!) or worse instead of the current O(n), but that comes
with the territory).

Sean Chittenden
 		2004-06-02 21:34:49 +00:00
config Configure adjustments for irix. 2004-05-19 22:12:30 +00:00
contrib Fix silly bug 2004-06-01 10:24:25 +00:00
doc Small patch that adds some documentation for the area() function. 2004-06-02 21:34:49 +00:00
src Per previous discussions, here are two functions to send INT and TERM 2004-06-02 21:29:29 +00:00
COPYRIGHT Fix some copyright notices that weren't updated. Improve copyright tool 2003-08-04 23:59:41 +00:00
GNUmakefile.in Remove all of the libpgtcl and pgtclsh files, including all references to 2004-04-20 00:33:53 +00:00
Makefile Restructure the key include files per recent pghackers discussion: there 2001-02-10 02:31:31 +00:00
README Remove JDBC from the build system and documentation, too. 2004-01-19 21:20:06 +00:00
README.CVS Some further editorializing on README.CVS. 2004-03-28 06:09:08 +00:00
aclocal.m4 Add new auto-detection of thread flags. 2004-04-23 18:15:55 +00:00
configure Remove quotes around $CONFIG_LINKS. Caused improper expansion. 2004-05-28 20:52:42 +00:00
configure.in Remove quotes around $CONFIG_LINKS. Caused improper expansion. 2004-05-28 20:52:42 +00:00

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 several language
bindings, including C and Tcl.

The JDBC, ODBC, C++, and Python interfaces have been moved to the PostgreSQL
Projects Web Site at http://gborg.postgresql.org for separate maintenance.
A Perl DBI/DBD driver is available from CPAN.

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
ftp://ftp.postgresql.org/pub/.  For more information look at our web
site located at http://www.postgresql.org/.