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From Chris Hostetter <hossman_luc...@fucit.org>
Subject RE: Unexpected Results - using should and must in boolean query
Date Sat, 18 Sep 2010 02:20:42 GMT

: If you have some MUST terms, but you also want to have at least one of a
: list of other terms (like 5 SHOULD clauses), the trick is to separate both:
: Create a BooleanQuery with 2 MUST clauses, one is your required TermQuery
: and the second clause is itself a BooleanQuery with all the SHOULD clauses.
: This ensures that at least one of the SHOULD terms is needed together with
: the MUST term.

BooleanQuery.setMinimumNumberShouldMatch(1) has hte same effect on what is 
matched w/o requiring a nested BooleanQuery -- and because of the coord 
factor the scores from the single BooleanQuery will probably better 
represent your goal then using the nested BooleanQueries.



-Hoss

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