lucene-java-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Victor Hadianto <vict...@nuix.com.au>
Subject Re: Query across multiple fields scenario not handled by "MultiFieldQueryParser"
Date Wed, 02 Jul 2003 23:48:32 GMT
> I need to perform a search for an expression in
> multiple fields "as if" they were one field. 

Depending on your time requirment, you can as you have suggested yourself 
write your own QueryParser. However a simple hack will be to have an "all" 
field and simple reindex the data in F and G to this "all" field. 

> little JavaCC expertise. Suggestions for solving the
> problem at a higher level than the QueryParser are of
> course also very welcome.

Well this is definitely not "higher" level than QueryParser :)

HTH
victor

On Thu, 3 Jul 2003 09:41 am, Ali Rouhi wrote:
> Hi
>
This is
> best illustrated by a simple example.
>
> Find expression (X AND Y) in fields (F, G).
>
> I want this to translate to:
>
> ((X in F) OR (X in G)) AND ((Y in F) OR (Y in G))
>
> In other words I want the query to return true *not
> only* if
>
> ((X AND Y) in F) OR ((X AND Y) in G)
> (1)
>
> but *also* the following should give me a true value
>
> ((X in F) AND (Y in G)) OR ((X in G) AND (Y in F))
> (2)
>
> I believe that "MultiFieldQueryParser" just gives me
> (1) and leaves out the "cross terms" in(2).(If you
> want a practical example of why one would want to do
> such a search I would be glad to provide one).
>
> Of course I could construct the combination of (1) and
> (2) manually, but the problem is that I want the
> "general solution" with a general expression being
> searched for in multiple fields in the manner of the
> above example.
>
> I have a feeling that this sort of a thing is best
> done by writing a custom QueryParser.jj. We use Lucene
> in production code and have great java expertise, but
>
> Many Thanks
> Ali



---------------------------------------------------------------------
To unsubscribe, e-mail: lucene-user-unsubscribe@jakarta.apache.org
For additional commands, e-mail: lucene-user-help@jakarta.apache.org


Mime
View raw message