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Subject: Search performance using BooleanQueries in
BooleanQueries
Date: Fri, 26 Oct 2007 09:36:58 +0200
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Thread-Topic: Search performance using BooleanQueries in
BooleanQueries
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From: "Ard Schrijvers" <a.schrijvershippo.nl>
To: <java-userlucene.apache.org>
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Hello,=20
I am seeing that a query with boolean queries in boolean
queries takes
much longer than just a single boolean query when the number
of hits if
fairly large. For example=20
+prop1:a +prop2:b +prop3:c +prop4:d +prop5:e=20
is much faster than=20
(+(+(+(+prop1:a +prop2:b) +prop3:c) +prop4:d) +prop5:e)
where the second one is a result from BooleanQuery in
BooleanQuery, and
all have Occur.MUST.
Is there a way to detect and rewrite the second inefficient
query?
query.rewrite() does not change the query AFAICS.=20
thanks for any help,
Regards Ard
--=20
Hippo
Oosteinde 11
1017WT Amsterdam
The Netherlands
Tel +31 (0)20 5224466
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a.schrijvershippo.nl / ardapache.org / http://www.hippo.nl
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