Re: RE : BooleanQuery/Clauses with Linked Filters

[Erik Hatcher]

On Feb 25, 2004, at 9:39 AM, Rasik Pandey wrote:
On Feb 25, 2004, at 6:48 AM, Rasik Pandey wrote:
I was wondering if it is somehow possible to tie filters to
individual
boolean queries/clauses. I didn't see any such possibility
with a
quick inspection of the code and I am not sure if a special
HitCollector implementation would be sufficient or even
merited. Any
ideas, suggestions, or comments would be appreciated.
I'm not following what you mean.  Could you describe a concrete
example
of what you're after?
Searching Lucene with a BooleanQuery using Searcher.search(Query 
query, Filter filter) does not allow for coupling filters to 
sub-queries of the BooleanQuery, but rather coupling a filter to the 
parent BooleanQuery.
right - you cannot apply filters to subqueries.  A filter is really a 
pre-query screen, not really part of the query itself.

Currently we can do this:

BooleanQuery not Filter(state, texas) not Filter(country, georgia)
-TermQuery(city, paris)
OR
-TermQuery(state, georgia)
instead we would like to be able to do this.
BooleanQuery
-TermQuery(city, paris) not Filter(state, texas)
OR
-TermQuery(state, georgia) not Filter(country, georgia)
Let me know if this isn't clear.
Its still not entirely clear, but it seems you could accomplish what 
you want by putting in some AND TermQuery's in there instead of trying 
to use a Filter.  Wouldn't that do what you want?

	Erik

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