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Tom Lane 077db40fa1 ALTER TABLE rewrite. New cool stuff: 
* ALTER ... ADD COLUMN with defaults and NOT NULL constraints works per SQL
spec.  A default is implemented by rewriting the table with the new value
stored in each row.

* ALTER COLUMN TYPE.  You can change a column's datatype to anything you
want, so long as you can specify how to convert the old value.  Rewrites
the table.  (Possible future improvement: optimize no-op conversions such
as varchar(N) to varchar(N+1).)

* Multiple ALTER actions in a single ALTER TABLE command.  You can perform
any number of column additions, type changes, and constraint additions with
only one pass over the table contents.

Basic documentation provided in ALTER TABLE ref page, but some more docs
work is needed.

Original patch from Rod Taylor, additional work from Tom Lane.
2004-05-05 04:48:48 +00:00
config Unconditionally define: 2004-04-26 04:04:42 +00:00
contrib Attached is are a few small fixes for dbmirror. 2004-04-22 03:48:38 +00:00
doc ALTER TABLE rewrite. New cool stuff: 2004-05-05 04:48:48 +00:00
src ALTER TABLE rewrite. New cool stuff: 2004-05-05 04:48:48 +00:00
aclocal.m4 Add new auto-detection of thread flags. 2004-04-23 18:15:55 +00:00
configure More cleanups for USE_PGTZ. 2004-04-30 16:08:01 +00:00
configure.in More cleanups for USE_PGTZ. 2004-04-30 16:08:01 +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

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/.