Re: How to do RangeQuery on a Computed Value of a Field?

Hi Eric,

Tnx, I just saw the example in Lucene in Action.  But I am
not sure how I can apply it in my case as it was used to
sort the results, but what I need is to get only the records
that are within a limit radius.  And I want the results to
be sorted according to score (text match on title ).  

Tnx for pointing me to that direction, I will study it and
see how I can use it.  

Johnny

----- Original Message ----
From: Erick Erickson <erickericksongmail.com>
To: java-userlucene.apache.org; Johnny R. Ruiz III
<jorziyahoo.com>
Sent: Monday, October 22, 2007 2:56:46 AM
Subject: Re: How to do RangeQuery on a Computed Value of a
Field?


There's also an example of something very similar in Lucene
In Action.

Erick

On 10/20/07, Johnny R. Ruiz III <jorziyahoo.com> wrote:
>
> Hi All,
>
> I was looking for a way to do a range query on 2
numeric field of my
> index.  The tricky part is, I don't directly use the
numeric field
 but I
> have to use it on a computation formula to satisfy my
criteria.
>
> Hope this helps to explain my scenario:
>
> pointX-->  latitude X input by user.
> pointY-->  longitude Y input by user.
>
> locX  -->  field indexed in lucene
> locY  -->  field indexed in lucene
>
> radius -->  constant value as acceptable distance to
be returned in
 search
> results (hits)
>
> Conditon to satisfy:
>
> Math.sqrt ( (  locX - pointX ) + ( locY - pointY ) )
<= radius
>
> Is this possible in lucene?  Has anyone did this
before?  Thanks in
> Advance!
>
> My Actual Use Case is I want to return all location
within a certain
> Radius of 1 mile given PointX and PointY from User.
>
> Regards,
> Johnny Ruiz
>
>
>
>
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