Why is query result set caching disabled for grouping queries?

[astubbs <an...@gmail.com>]

For a given unchanged index, for a given query, the result will always be the
same. So why is caching disabled for grouping queries?

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Re: Why is query result set caching disabled for grouping queries?

[astubbs <an...@gmail.com>]

Been looking at the code a bit, and it seems it's not disabled per se, it's
just not there. The normal searcher has an inbuilt result set cache check
before and after executing, where as the Grouping#execute doesn't have any
concept of result cache. 

Can't they just share the same cache and implementation system? 

Has this just simply not been "done" yet?

There also seems to be a lot of prep and post work around the
Grouping#execute call from QueryComponent that doesn't exist around
searcher#search. Should this code perhaps be refactored into an intermediate
step?

I'm looking at:
QueryComponent#process
Grouping#execute
SolrIndexSearcher#search and getDocList

Cheers for the info.
Antony.

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