LEAP RDBMS / News: Recent posts

leapattributes bug resolved

After far FAR too long, I've finally been able to track down and - I think - resolve the 'leapattributes' bug that has plagued the last couple of releases of LEAP.

I've therefore made leap- available on the sourceforge download site:


Note that there may be an hour or two delay whilst the file propagates to the sourceforge mirrors. A patch is available too, which can be applied to a 1.2.6 installation with the following command (run in the directory above the versioned LEAP directory):... read more

Posted by Richard Leyton 2004-02-09


After about 10,000 downloads of the design PDF, I'm pulling it off of Sourceforge. In a nutshell, I'd like better feedback on how people are using this PDF, and SF doesn't give it to me as far as I can see.

It can still be downloaded via my personal home page: http://leyton.org/publications.html

Posted by Richard Leyton 2003-03-03

Changes for 1.2.7/1.3

Dear all,

I've spent a little time over the last few days making some plans for some significant upheavals to LEAP to improve its reliability.

This will probably turn LEAP into version 1.3, although depending on the amount of change, it could still be "just" 1.2.7.

I don't plan on changing much in the way of visible changes at this stage, although depending on how things go, that may well prove the case. If there's something you'd like to see in LEAP, please drop me a note, or complete a feature request at Sourceforge:... read more

Posted by Richard Leyton 2002-07-08

1.2.6 released

This post is to announce the release of v1.2.6 of the LEAP RDBMS.

LEAP is a free relational database management system (RDBMS) that is
sed by an increasing number of universities around the world as a part
of their database courses. LEAP fully supports the relational algebra,
and the behavioral components of the relational model. It is intended
as a teaching tool and foundation for further work. It is free and
distributed under the terms of the GNU General Public License (GPL).... read more

Posted by Richard Leyton 2001-08-20

LEAP Book published

I'm more than a little pleased to be able to announce that a book has just
been published which I've co-authored, that features a chapter on LEAP.

The book is the long awaited 2nd Edition of "Theory and Practice of
Relational Databases", by Stefan Stanczyk, Bob Champion and Richard Leyton.

More details can be found at:


There are a few reasons I'm posting this to the LEAP list:... read more

Posted by Richard Leyton 2001-08-13

Precompiled releases

Releases of LEAP are now available, precompiled for the following platforms:

- Linux 2.2 (i386)
- Sun Solaris 8 (sparc)
- FreeBSD 4.2 (i386)

Others will be added in due course, based on available computer facilities.

They may be downloaded from:


Posted by Richard Leyton 2001-04-30

WinLEAP source code available

The source code to WinLEAP has been made available under CVS. You can browse to it at:


Further details about the program will be made available in the README file. For details on getting access to the CVS tree see:




Posted by Richard Leyton 2001-04-29 released

Version of LEAP has been released. This contains a couple of minor bug fixes and some tidy-ups.

It's the recommended version.

Posted by Richard Leyton 2001-04-27

New website

The LEAP website has been completely redesigned, thanks to the help of Jamie from http://www.fourfusion.com

More content and information will be added to the site over the coming weeks. In the meantime, please visit the new site, and feedback any comments you might have in the LEAP forums.




Posted by Richard Leyton 2001-04-26

CVS repository

I'm pleased to be able to announce that the LEAP CVS repository has been moved to the sourceforge facility (http://sourceforge.net/projects/leap)

Read-Only access is available to everybody, as well as a web-browsable version. See the instructions at https://sourceforge.net/cvs/?group_id=44

If you'd like access to commit changes, please contact me.


Richard Leyton.

Posted by Richard Leyton 2001-03-30

leap documentation

i'm pleased to be able to let you know that, after much delay, i've finally recovered some of the original design dcumentation for LEAP,
when it first appeared back in 1995.

the file will hopefully be available today or tomorrow as a PDF file. if you'd like to receive a copy, please drop me an e-mail (rleyton@acm.org). the file will be between 400Kb and 500Kb.

the documentation pertains to the version of LEAP that i wrote back as a student at Oxford Brookes University between 1991 and 1995. LEAP was my
final year project. the version of LEAP as it existed then was a PC (ms-dos) program, written in Borland Pascal, and had a lot fewer features than the current incarnation (and different approaches to many of the common ones). admittedly, it did also have a couple of key features (such as indicies), which are yet to appear in the current
version.... read more

Posted by Richard Leyton 2001-03-08

Moved to Sourceforge

The LEAP RDBMS home page has now moved to sourceforge, following the regretful closure of xnot.

Details will follow as various features of sourceforge become available.



Posted by Richard Leyton 2000-02-27

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