With the 'lucene' query parser?
include &q.op=OR and then put a "+" ("mandatory") in front of every term
in the 'q' that is NOT optional, the rest will be optional. I think
that will do what want.
Jonathan
On 1/25/2011 5:07 PM, Daniel Pötzinger wrote:
Hi
I am searching for a way to specify optional terms in a query ( that dont need
to match (But if they match should influence the scoring) )
Using the dismax parser a query like this:
<str name="mm">2</str>
<str name="debugQuery">on</str>
<str name="q">+lorem ipsum dolor amet</str>
<str name="qf">content</str>
<str name="hl.fl"/>
<str name="qt">dismax</str>
Will be parsed into something like this:
<str name="parsedquery_toString">
+((+(content:lor) (content:ipsum) (content:dolor) (content:amet))~2) ()
</str>
Which will result that only 2 of the 3 optional terms need to match?
How can optional terms be specified using the standard request handler?
My concrete requirement is that a certain term should match but another is
optional. But if the optional part matches - it should give the document an
extra score.
Something like :-)
<str name="q">content:lorem #optional#content:optionalboostword^10</str>
An idea would be to use a function query to boost the document:
<str name="q">
content:lorem _val_:"query({!lucene v='optionalword^20'})"
</str>
Which will result in:
<str name="parsedquery_toString">
+content:forum +query(content:optionalword^20.0,def=0.0)
</str>
Is this a good way or are there other suggestions?
Thanks for any opinion and tips on this
Daniel
