PrefixQuery question

[Cam Bazz <ca...@gmail.com>]

Hello,

I am having a problem qith PrefixQuery:

I have a field name item title which is indexed as:

doc.add(new Field("item_title", item_title.trim().toLowerCase(),
Field.Store.YES, Field.Index.TOKENIZED, Field.TermVector.YES));

and I am forming my query like:

PrefixQuery pq = new PrefixQuery((new Term("item_title", queryText)));

Lets say I have some documents such as

mouse cat apple
mouse cat house
cat house mouse


and when I search for prefix mou, it will return all of 3 documents. what I
like to do is for it to return "mouse cat apple" and "mouse cat house" and
not "cat house mouse"

it will only do this if the field is untokenized I believe.

is there any way to get the desired behavior?

best,
-C.B.

Re: PrefixQuery question

[Shai Erera <se...@gmail.com>]

Did you try SpanFirstQuery?

I had the same need in my application, for implementing type-ahead
functionality over the titles and I found that storing them as un_tokenized
gives the best performance (of course, I don't run any query, but iterate
over the terms in my solution).
Span queries are expensive, but you can try it.

On Jan 8, 2008 1:13 PM, Cam Bazz <ca...@gmail.com> wrote:

> Hello,
>
> I am having a problem qith PrefixQuery:
>
> I have a field name item title which is indexed as:
>
> doc.add(new Field("item_title", item_title.trim().toLowerCase(),
> Field.Store.YES, Field.Index.TOKENIZED, Field.TermVector.YES));
>
> and I am forming my query like:
>
> PrefixQuery pq = new PrefixQuery((new Term("item_title", queryText)));
>
> Lets say I have some documents such as
>
> mouse cat apple
> mouse cat house
> cat house mouse
>
>
> and when I search for prefix mou, it will return all of 3 documents. what
> I
> like to do is for it to return "mouse cat apple" and "mouse cat house" and
> not "cat house mouse"
>
> it will only do this if the field is untokenized I believe.
>
> is there any way to get the desired behavior?
>
> best,
> -C.B.
>



-- 
Regards,

Shai Erera