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From: "Radhalakshmi  Sreedharan" <Radhalakshmi_S@infosys.com>
To: "java-user@lucene.apache.org" <java-user@lucene.apache.org>
Date: Thu, 16 Apr 2009 18:04:30 +0530
Subject: Need help : SpanNearQuery
Thread-Topic: Need help : SpanNearQuery
Thread-Index: Acm+iNF1pm27j7zFQguuTqAOr5YfMAABtBKw
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Hi=20,

I=20have=20a=20question=20related=20to=20SpanNearQuery.

As=20of=20now,=20the=20=20SpanNearQuery=20has=20the=20constraint=20that=
=20all=20the=20terms=20need=20to=20present=20in=20the=20document.
Eg=20:=20If=20my=20SpanNearQuery=20terms=20=20are=20(=20ab,bc,cd)=20all=
=20of=20them=20need=20to=20be=20found=20within=20a=20span=20of=20"n"=20an=
d=20unordered.

But=20my=20requirement=20is=20similar=20to=20=20<http://www.gossamer-thre=
ads.com/lists/lucene/java-user/67382#67382>

I=20need=20a=20hit=20even=20if=20there=20are=202/3=20terms=20found=20with=
=20the=20span=20being=20applied=20for=20those=202=20terms.

Is=20there=20any=20custom=20implementation=20in=20place=20for=20this?=20I=
=20checked=20SrndQuery=20but=20that=20also=20doesn't=20work.

This=20is=20my=20workaround=20currently:


1)=20=20=20=20=20=20For=20a=20list=20of=20terms=20(=20ab,bc,=20cd,ef)=20,=
=20make=20a=20set=20like=20(=20ab,bc)=20,=20(=20bc,cd)=20(=20ab,cd)=20(bc=
,ef)=20(=20ab,bc,cd)=20(=20ab,bc,cd,ef).....=20and=20so=20on.

2)=20=20=20=20=20=20Create=20a=20spanNearQuery=20for=20=20each=20of=20the=
se=20terms

3)=20=20=20=20=20=20Add=20it=20to=20the=20booleanQuery=20with=20a=20=20SH=
OULD=20clause.


However=20this=20approach=20gives=20me=20puzzling=20scores
=20eg=20If=20my=20document=20has=20=20only=20(=20ab,bc,cd)=20the=20penalt=
y=20for=20the=20missing=20ef=20is=20very=20high=20and=20my=20score=20come=
s=20down=20quite=20a=20bit.

<=20the=20score=20value=20is=20=20of=20importance=20as=20I=20am=20using=
=20it=20further=20down=20the=20line=20for=20other=20calculations>

It=20would=20be=20great=20if=20you=20can=20help=20me=20out=20with=20this.

Regards,
Radha

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