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Tom Lane f6dba10e62 First phase of implementing hash-based grouping/aggregation. An AGG plan 
node now does its own grouping of the input rows, and has no need for a
preceding GROUP node in the plan pipeline.  This allows elimination of
the misnamed tuplePerGroup option for GROUP, and actually saves more code
in nodeGroup.c than it costs in nodeAgg.c, as well as being presumably
faster.  Restructure the API of query_planner so that we do not commit to
using a sorted or unsorted plan in query_planner; instead grouping_planner
makes the decision.  (Right now it isn't any smarter than query_planner
was, but that will change as soon as it has the option to select a hash-
based aggregation step.)  Despite all the hackery, no initdb needed since
only in-memory node types changed.
 		2002-11-06 00:00:45 +00:00
config Remove leftovers from subproject removals. Fixes for Python and Kerberos 2002-09-04 22:54:18 +00:00
contrib Remove extraneous semicolons after routine bodies. These don't bother 2002-11-04 17:14:29 +00:00
doc Add OS/X kernel tuning section. 2002-11-05 23:16:56 +00:00
src First phase of implementing hash-based grouping/aggregation. An AGG plan 2002-11-06 00:00:45 +00:00
COPYRIGHT Update copyright to 2002. 2002-06-20 20:29:54 +00:00
GNUmakefile.in First step to removing /contrib/retep, with Peter Mount's approval. 2002-10-21 00:12:46 +00:00
HISTORY Stamp for 7.3 beta3. 2002-10-24 03:03:37 +00:00
INSTALL Specify that we need bison >= 1.50. 2002-10-22 13:46:59 +00:00
Makefile Restructure the key include files per recent pghackers discussion: there 2001-02-10 02:31:31 +00:00
README Remove all traces of the ODBC driver, which is now on GBorg as the psqlodbc 2002-08-22 22:43:14 +00:00
aclocal.m4 Remove leftovers from subproject removals. Fixes for Python and Kerberos 2002-09-04 22:54:18 +00:00
configure Brand CVS tip as 7.4devel. 2002-11-04 21:36:13 +00:00
configure.in Brand CVS tip as 7.4devel. 2002-11-04 21:36:13 +00:00
register.txt Stamp for 7.3 beta3. 2002-10-24 03:03:37 +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, Perl, Python, and Tcl, as well as drivers
for JDBC.

As of v7.3, the ODBC and C++ interfaces have been moved over to the
PostgreSQL Projects WebSite @ http://gborg.postgresql.org.

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/.