[Zope] Intersection/Union of ZCatalog result sets

[Andreas Jung]

You should have a look at AdvancedQuery for perform complex ZCatalog 
queries.

-aj

--On Mittwoch, 22. September 2004 17:31 Uhr -0400 Jonathan Hobbs 
<toolkit at magma.ca> wrote:

> I have found some old references to proposals for implementing the ability
> to combine (intersection, union) the result sets from multiple ZCatalog
> queries.  Does anyone know if the ability to combine two or more 'lazy
> result sets' has been implemented?
>
> Hunting through the zope source code the only similar routines I could
> find were in the BTrees and ZCTextIndex code, but they deal with
> intersection/union of BTrees (not lazy result sequences).  As an
> alternative, is there any way to get ZCatalog search results in 'BTree'
> form instead of lazy results?
>
> Thanks,
>
> Jonathan
>
>
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