: I am experimenting with using a custom filter with QueryParser and ran into
: some unanticipated issues with using NOT terms. I narrowed down the issue
...
: bquery = new BooleanQuery();
: bquery.add(new BooleanClause(fq, BooleanClause.Occur.MUST_NOT));
: hits = this.searcher.search(bquery);
: assertTrue(hits.length() == 1); // <<<<<<<<< returns 0,
expecting doc #2 (t2) to return...
...this isn't really a Filter issue at all, you're trying to execute a
query that only contains prohibited (ie: MUST_NOT) clauses. Thus you are
not positively selecting anything -- this is one of hte main use for
MatchAllDocsQuery, try...
bquery = new BooleanQuery();
bquery.add(new BooleanClause(fq, BooleanClause.Occur.MUST_NOT));
bquery.add(new BooleanClause(new MatchAllDocsQuery(),
BooleanClause.Occur.MUST));
hits = this.searcher.search(bquery);
assertTrue(hits.length() == 1);
...incidently, if you are constructing a FilteredQuery arround a
MatchAllDocsQuery, you might as well use a ConstantScoreQuery instead.
-Hoss
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