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From Yonik Seeley <ysee...@gmail.com>
Subject Re: "Starts with" query?
Date Thu, 05 Jan 2006 22:33:40 GMT
Off the top of my head:
1) also index the field untokenized and use a straight prefix query
2) index a magic token at the start of the title and include that in a
phrase query:
   "_START_ the quick"
3) use a SpanFirst query (but you have to make the Java Query object yourself)

-Yonik

On 1/5/06, Paul Smith <psmith@aconex.com> wrote:
> I'm throwing myself at the mercy of the lucene community, I'm a bit
> brain dead today after looking after a screaming 3 month old baby for
> 4 hours last night...
>
> We have a 'title' field indexed as Field.Text(...), which works
> nicely, and has lots of good searching.
>
> However, this application is being ported from a DB based search,
> which had originally a "starts with" type search, and we need to
> support that.
>
> So, given "The quick brown fox jumped of the caffeine addicted
> software developer", if the user types "The quick*" we need to find
> only those that have a title that starts with, and NOT match
> documents that have "The quick" as a sequence of terms later in the
> title (ie don't match "blah blah the quick blah blah").
>
> Think SQL of " ....where title like 'The quick%'  ".
>
> How do I do that with Lucene?  I'm sure this a is a dumb question,
> and I know that Lucene's searching is way more useful than that, but
> you know these pesky compatibility requirements.....It's screwing
> with my unit tests because the new index search results are getting
> more results that the old db method.
>
> cheers,
>
> Paul Smith
>
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