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From Jin Guang Zheng <zhen...@rpi.edu>
Subject Re: Lucene Query
Date Tue, 19 Aug 2014 23:21:34 GMT
Thanks so much, that works.
Jin



On Tue, Aug 19, 2014 at 4:13 PM, Uwe Schindler <uwe@thetaphi.de> wrote:

> Hi,
> Look at his docs. He has only 2 docs, the second one 3 keywords.
>
> I would use a simple phrase query with a slop value < Analyzers
> positionIncrementGap. This is the gap between fields with same name. Span
> or phrase cannot cross the gap, if slop if small enough, but large enough
> to find the terms next to each other.
>
> SpanQuery is not needed. Phrase does all thats needed. Slop is like edit
> distance of whole terms, order does not matter.
>
> Uwe
>
> Am 19. August 2014 22:05:23 MESZ, schrieb Tri Cao <tmcao@me.com>:
> >OR operator does that, AND only returns docs with ALL terms present.
> >
> >Note that you have two options here
> >1. Create a BooleanQuery object (see the Java doc I linked below) and
> >programatically
> >add the term queries with the following constraint:
> >
> http://lucene.apache.org/core/4_6_0/core/org/apache/lucene/search/BooleanClause.Occur.html#MUST_NOT
> >
> >2. Use Lucene classic QueryParser and pass in the query string "states
> >AND america AND united"
> >
> >I would suggest 1) if you are going to learn more about Lucene, and 2)
> >if you are just want to get some thing out.
> >
> >Hope this helps,
> >Tri
> >
> >On Aug 19, 2014, at 12:17 PM, Jin Guang Zheng <zhengj3@rpi.edu> wrote:
> >
> >Thanks for reply, but won't BooleanQuery return both doc1 and doc2 with
> >query:
> >
> >label:States AND label:America AND label:United
> >
> >Best,
> >Jin
> >
> >
> >On Tue, Aug 19, 2014 at 2:07 PM, Tri Cao <tmcao@me.com      > wrote:
> >
> >       > given that example, the easy way is a boolean AND query of all
> >the terms:
> >        >
> >        >
> >       >
> >
> http://lucene.apache.org/core/4_6_0/core/org/apache/lucene/search/BooleanQuery.html
> >        >
> >       > However, if your corpus is more sophisticated you'll find that
> >relevance
> >        > ranking is not always that trivial :)
> >        >
> >       > On Aug 19, 2014, at 11:00 AM, Jin Guang Zheng <zhengj3@rpi.edu
> >   > wrote:
> >        >
> >        > Hi,
> >        >
> >        > I am wondering if someone can help me on this:
> >        >
> >        > I have index:
> >        >
> >        > doc 1 -- label: United States of America
> >        >
> >        > doc 2 -- label: United
> >        > doc 2 -- label: America
> >        > doc 2 -- label: States
> >        >
> >       > I am wondering how to generate a query with terms: states
> >united america
> >        >
> >        > so only doc 1 returns.
> >        >
> >        >
> >        > I was thinking SpanNearQuery, but can't make it work.
> >        >
> >        > Thanks,
> >        > Jin
> >        >
> >        >
>
> --
> Uwe Schindler
> H.-H.-Meier-Allee 63, 28213 Bremen
> http://www.thetaphi.de

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