I don’t think I can use span-term(null_1). That is not a specific value I 
indexed, but a value put into the index when we call 
token.setPositionIncrement(2) on the first token in the token stream, 
essentially skipping a position.

-----Original Message-----
From: Trejkaz [mailto:trej...@trypticon.org]
Sent: Saturday, August 27, 2011 9:59 AM
To: java-user@lucene.apache.org
Subject: Re: Possible to use span queries to avoid stepping over null index 
positions

On Sat, Aug 27, 2011 at 2:30 AM,  <ikoelli...@daegis.com> wrote:
> Hello,
> In our indexes we have a field that is a combination of other various 
> metadata fields (i.e. subject, from, to, etc.). Each field that is added has 
> a null position at the beginning. As an example, in Luke the field data looks 
> like:
>
> null_1 this is a test subject null_1 ikoelliker email address
>
> If someone searches this field using a NEAR or WITHIN style query for 
> "subject email"~10. This message will be found. Is it possible to use Span 
> Queries to avoid stepping over null position?

Seems like you could:

    span-not(
      span-near(
        span-term(subject)
        span-term(email)
        10 ),
      span-term(null_1))

This is similar to tricks I have seen to return span matches in the
same sentence.

TX

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