+1 I have an application that needs a performance boost that this might offer over my existing workaround. In my application, I have online classified ad listings for real-estate listings(perhaps thousands in any given category), and need to sort on a geographic area, and then on a title. My current strategy is to do my own smart-but-bloated multi-pass sort of the entire result set for each request, then display batches using that result set, which uses more RAM and CPU than I would ideally like. Sean -----Original Message----- From: Dieter Maurer [mailto:dieter@handshake.de] Sent: Friday, March 28, 2003 3:27 PM To: Wankyu Choi Cc: sean.upton@uniontrib.com; tdickenson@geminidataloggers.com; mvalente@ruido-visual.pt; zope@zope.org Subject: Multiple sort keys for ZCatalog searching (was: RE: [Zope] Hardware for Zope + ZEO) Wankyu Choi wrote at 2003-3-27 05:24 +0900:

.... I need two sort keys: one to sort the threads (parents) and the other to sort their replies (childs). ZCatalog supports a single sort index,

I have code to extend ZCatalog's sorting capability to arbitrary many sort keys. Maybe, we want something like this in the Zope core? Dieter