There is one possibility to get *all* documents, if you are happy with the fact
that non-matching documents get a score factor of 0.0:
Scores of SHOULD clauses in a Boolean query get "added". You can combine your
original query ("yourOriginalQuery"; with real scores) with another query
("fakeQuery") matching all documents and having score = 0.0 in a single final
BooleanQuery ("finalQuery"=, you get score 0.0 for non-matching documents, and
score 0.0 + realScore => realScore for all others:
BooleanQuery finalQuery = new BooleanQuery(true); // BooleanQuery without coord
factors, so it just adds scores nothing else
finalQuery.add(yourOriginalQuery, BooleanClause.Occur.SHOULD);
Query fakeQuery = new MatchAllDocsQuery();
fakeQuery.setBoost(0); // tune the boost, so this query always returns a score
of 0
finalQuery.add(fakeQuery, BooleanClause.Occur.SHOULD);
// execute finalQuery!
Hope that helps!
Uwe
-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: [email protected]
> -----Original Message-----
> From: Susrutha Gongalla [mailto:[email protected]]
> Sent: Tuesday, May 12, 2015 12:28 PM
> To: [email protected]
> Subject: Controlling size of matched results in Lucene
>
> Hello,
>
> I am developing a matching algorithm using Lucene 4.10.0 My index consists
> of about 2000 documents.
> When I use the 'search' method on a query term, I get about n results that
> point to the n documents in index along with their corresponding scores.
> What I would like to get is - All the 2000 documents with their lucene scores
> along with whether they are matched/unmatched.
> I would like to control the size of results that lucene returns when I search
> for
> a query term.
>
> I have tried altering the default similarity used in lucene by overriding the
> score methods.
> However, this did not affect the size of results generated by lucene.
>
> I also tried explicitly given 'null' value for filter, when calling the
> 'search'
> method.
> This also did not affect the size of results.
>
> I just started working with Lucene.
> Would appreciate any help in this regard!
>
> Best,
> Susrutha Gongalla
