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From Marc Hadfield <m...@animarc.com>
Subject Re: query across fields?
Date Mon, 10 Oct 2005 21:07:56 GMT
Doug Cutting wrote:

> Why not store them in the same field using positionIncrement=0 for the 
> types?  Then they won't change positions of non-type tokens.  You 
> should distinguish the types syntactically, e.g., prefix them with a 
> space or other character that does not occur within words.  That way 
> queries on this field for the term "name" won't match a type token.
>
> Doug


Hi Doug, thanks for your reply,

I actually mention your option in my email:

> I would prefer not to mix the full text and "types" in the same field 
> as it would make the term positions inconsistent which i depend on for 
> other queries.
>
> In principle I could store the full text in two fields with the second 
> field containing the types without incrementing the token index.   
> Then, do a SpanQuery for "Johnson" and "name" with a distance of 0.  
> The resulting match would have a token position which would refer back 
> to the matching position in the first field.  I don't know if this is 
> a really good idea.

ie Field_B = full text interlaced with "types" following each full text 
token with positionIncrement=0

However, as far as I understand, the standard TermQuery won't let me 
check if "Johnson" and "__name__" occur at the **same** position.  
Perhaps, as I ask above, a SpanQuery will allow multiple terms with a 
distance of zero (0) , that is they were indexed with 
positionIncrement=0 and SpanQuery can handle 0 distance terms?





---Marc





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