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Posted to java-user@lucene.apache.org by Melanie Langlois <Me...@tradingscreen.com> on 2007/03/26 10:51:37 UTC
search on multiple fields
Hi,
I'm wondering if lucene would understand such a query:
content*:mysearch
It's just because I index several translations of my document contents in addition with common fields, and this separation is really usefull when an user specify the language in which he wants to search, but I want to be able to search among all languages if no option is specified. I could programmatically transform my content* into several sub queries content-en:mysearch content-fr:mysearch ... but I'm concerned about the number of conditions it will generate. So that would be cool if lucene automatically look into all concerned fields.
Thanks,
Mélanie
Re: search on multiple fields
Posted by Daniel Noll <da...@nuix.com>.
Melanie Langlois wrote:
> Hi,
>
> I'm wondering if lucene would understand such a query:
>
> content*:mysearch
>
> It's just because I index several translations of my document
> contents in addition with common fields, and this separation is
> really usefull when an user specify the language in which he wants to
> search, but I want to be able to search among all languages if no
> option is specified. I could programmatically transform my content*
> into several sub queries content-en:mysearch content-fr:mysearch ...
> but I'm concerned about the number of conditions it will generate. So
> that would be cool if lucene automatically look into all concerned
> fields.
You could probably subclass QueryParser to do something like this.
The naive way would be to have the subclass build a BooleanQuery as you
mentioned already. A less naive way would be to create a
MultiFieldTermQuery which extends from MultiTermQuery, and does the
enumeration over the fields which match the prefix. You'd probably need
to do the same for phrases though which would be more difficult. :-)
Daniel
--
Daniel Noll
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Re: search on multiple fields
Posted by Grant Ingersoll <gs...@apache.org>.
Have a look at the MultifieldQueryParser. It isn't exactly what you
are describing, but should be able to handle it. If you are building
your queries programmatically, you can ask the IndexReader for the
field names using getFieldNames method.
On Mar 26, 2007, at 4:51 AM, Melanie Langlois wrote:
> Hi,
>
>
>
> I'm wondering if lucene would understand such a query:
>
>
>
> content*:mysearch
>
> It's just because I index several translations of my document
> contents in addition with common fields, and this separation is
> really usefull when an user specify the language in which he wants
> to search, but I want to be able to search among all languages if
> no option is specified. I could programmatically transform my
> content* into several sub queries content-en:mysearch content-
> fr:mysearch ... but I'm concerned about the number of conditions it
> will generate. So that would be cool if lucene automatically look
> into all concerned fields.
>
>
>
> Thanks,
>
>
>
> Mélanie
>
>
>
>
>
--------------------------
Grant Ingersoll
Center for Natural Language Processing
http://www.cnlp.org
Read the Lucene Java FAQ at http://wiki.apache.org/jakarta-lucene/
LuceneFAQ
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Re: search on multiple fields
Posted by Erick Erickson <er...@gmail.com>.
The fastest way to figure this out for yourself would be to fire up luke
and try it.
That said, I'm quite sure it won't work.
Erick
On 3/26/07, Melanie Langlois <Me...@tradingscreen.com> wrote:
>
> Hi,
>
>
>
> I'm wondering if lucene would understand such a query:
>
>
>
> content*:mysearch
>
> It's just because I index several translations of my document contents in
> addition with common fields, and this separation is really usefull when an
> user specify the language in which he wants to search, but I want to be able
> to search among all languages if no option is specified. I could
> programmatically transform my content* into several sub queries
> content-en:mysearch content-fr:mysearch ... but I'm concerned about the
> number of conditions it will generate. So that would be cool if lucene
> automatically look into all concerned fields.
>
>
>
> Thanks,
>
>
>
> Mélanie
>
>
>
>
>
>