What: TclRAL
Where: http://tclral.sourceforge.net/ Description: Tcl Relational Algebra Library is a C based extension that introduces tuple and relation data types and a set of commands that operate on them. Currently at version 0.8.5 . Updated: 01/2008 Contact: See web site
See also Transitive Closure.
See also Relations as Stacks.
See also Relations as Object Oriented Stacks.
See also crosstab a la Relations.
The Third Manifesto website [L1 ] lists TclRAL as:
Since many of the systems listed are described as not quite complete, TclRAL seems to do Very Good in an area of heavy duty computer science.
GAM 19 Nov 2007 In the spirit of full disclosure, I wrote the synopsis that is on the Third Manifesto web site. Mr. Darwen was kind enough to offer to put a link to the project on his web site after one of his associates brought it to his attention. He asked me to provide a synopsis which is what is found on the web site.
AM - 1 Oct 2006
I recently released Version 0.8 of TclRAL and thought that now was an appropriate time to make this page a bit more active for anyone that may be interested in the extension and wish to ask questions or post examples.
Version 0.8 is a complete rewrite of the extension to improve the code base and lay in a more maintainable structure. The major new feature of 0.8 is referential integrity checking. My current vision for the future is (roughly):
I won't be so bold as to state a time frame for all of this, but as I use the extension myself I am as anxious to see it improve as anyone.
AM - 6 Feb 2007
Released Version 0.8.1. This version is script compatible with 0.8 and includes some new commands and command options. Most notable is the ability to trace relvars in much the same manner that one can trace ordinary Tcl variables.
GAM - 17 Jan 2008
Released Version 0.8.5. This is a small bug fix release to deal with a latent bug that was exposed by a small change in the semantics of Tcl 8.5. Small though the bug was, it did prevent serializing relvars when used with Tcl 8.5.
RZ I had problems to compile tclral with native c-compilers on sun and sgi-irix. It is because of the use of unnamed structure/unions. Could you change this? With gcc there is no such problem.
See Andrew Mangogna.