I had a similar problem (I think). Look at using a WildcardFilter
(below), possibly wrapped in a CachingWrapperFilter, depending if you
want to re-use it. I over-rode the method QueryParser.getWildcardQuery
to customize it. In your case you would probably have to specifically
detect for the presence of a wildcard to use this.
Someone posted this a while back which I found helpful.
/**
* This is used to construct wildcard queries
* to avoid the 'too many boolean clauses' exception.
*
*/
public class WildcardFilter extends Filter {
private Term term;
public WildcardFilter(Term term) {
this.term = term;
}
/**
* A bit corrresponds to each document in the index and is set to
true if
* it matches the criterion in the wildcard search.
*
* @param reader - the indexReader @see
org.apache.lucene.index.IndexReader
* @return @see org.apache.lucene.search.Filter#bits()
*/
@Override
public BitSet bits(IndexReader reader) throws IOException {
BitSet bits = new BitSet(reader.maxDoc());
WildcardTermEnum enumerator = new WildcardTermEnum(reader,
term);
TermDocs termDocs = reader.termDocs();
try {
do {
Term term = enumerator.term();
if (term != null) {
termDocs.seek(term);
while (termDocs.next()) {
bits.set(termDocs.doc());
}
} else {
break;
}
} while (enumerator.next());
} finally {
termDocs.close();
enumerator.close();
}
return bits;
}
}
-----Original Message-----
From: d33mb33 [mailto:[EMAIL PROTECTED]
Sent: Tuesday, December 11, 2007 8:18 AM
To: [email protected]
Subject: Re: Post processing to get around TooManyClauses?
Ok I'm still struggling with this and a QueryFilter didn't help me one
bit
:-(
I'm trying to query for books by "Charles Dickens" that start with "m".
I
have constructed a QueryFilter for the author search and a PrefixQuery
for
the title search. A simplified version of my code is below.
' Charles Dickens query filter
Dim authorQry As TermQuery = New TermQuery(New
Term("ContributorName",
"dickens"))
Dim authorFlter As QueryFilter = New QueryFilter(authorQry)
' M* query
Dim titleQry As PrefixQuery = New PrefixQuery(New Term("Title",
"m"))
Dim topDocs As TopDocs = GetIndexSearcher().Search(titleQry,
authorFlter, maxResults)
This still throws a TooManyClauses exception because the PrefixQuery is
being expanded across the entire index.
--
View this message in context:
http://www.nabble.com/Post-processing-to-get-around-TooManyClauses--tp14
210833p14273737.html
Sent from the Lucene - Java Users mailing list archive at Nabble.com.
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