On Tuesday 20 November 2001 05:35 pm, Wolfram Kerber allegedly wrote: > Hi, > > i'm currently working on a product that allows to attach relational > information to zope-objects. It works quite well so far, but to further > enhance it i need to make some changes to the Catalog. I could perhaps > implement it as a separate product, but i strongly feel that those changes > are best applied to the Catalog itself, as they are of general use (i > think) and involve a lot of changes to the inner workings of the Catalog. > In particular i need the following: > > - named/stored queries > these are precompiled queries, so they can be executed without parsing and > are easily cacheable > i.e. similar to what is implemented in CMFTopic, but stored in the Catalog > and a bit smarter > > - caching support > > - unions and intersections > sub-queries (i.e. queries that are directed at a certain index) should be > more flexibly combineable
I have some code that implements this in my CatalogQuery product. It creates a query object from a string. Presently these are not persistent, but they could easily be made to be to create precompiled queries. code at: http://www.zope.org/Members/Kaivo/CatalogQuery > > I searched this mailing-list as well as zope.org to get an idea about what > has already been discussed and requested, and there seems to be some > interest in improving the Catalog. Some people even seem to have worked on > this, perhaps they could give an update on this? Possibly i don't have to > write everything from scratch... I would be willing to help both in coding and getting the code put into the Zope core. > I would have put this into a proposal, but there already are two proposals > that deal with the features i want, one is dedicated to > unions/intersections, the other (TopicIndexes) to performance issues (i > dont't know what's the status of these though, especially the first one is > rather old), and i don't want to hijack them without asking. As so often i > will need to complete my current project first, but would then like to help > in improving the Catalog for a more general use. Possibly we need to rekindle discussion. I would suggest contacting the authors of those proposals to see how compatible your concepts are wth theirs. Perhaps a new proposal should be drafted with the new ideas and ty them back to the previous ones. If there is redundancy, that can be worked out. > > So, if there is interest, i would propose to collect some ideas and > comments about how a better Catalog should look like, how it could be best > implemented and how to organize this effort (with respect to the already > existing proposals). I am very interested in such a discussion. Let me know what I can do to help. /---------------------------------------------------\ Casey Duncan, Sr. Web Developer National Legal Aid and Defender Association [EMAIL PROTECTED] \---------------------------------------------------/ _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://lists.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://lists.zope.org/mailman/listinfo/zope-announce http://lists.zope.org/mailman/listinfo/zope )