Count your parentheses (anyone here speak Lisp?) I think that +
is outside the entire clause, meaning it's saying that there is
a single mandatory clause, and it's the whole thing....
But boosting by 0.0 is probably a really bad thing. This may be
dropping all the scores to 0, which means "no match". The
default boost is 1.0 since it's multiplied to influence the score,
not added. So I'd try either not boosting or making
it something other than 0.
Best
Erick
On Mon, Jan 23, 2012 at 9:07 AM, Michael Jakl <jakl.mich...@gmail.com> wrote:
> Hi, I've been wondering why some of my queries did not return the
> results I expected. A debugQuery resulted in the following:
>
> <str name="querystring">
> "java"^0.0 OR "haskell"^0.0 OR "python"^0.0 OR ("ruby"^0.0) AND
> (("programming"^0.0)) OR "programming language"^0.0 OR "code
> coding"^0.0 OR -"mobile"^0.0 OR -"android"^0.0 OR -"microsoft"^0.0 OR
> -"windows"^0.0
> </str>
> <str name="parsedquery">
> +(DisjunctionMaxQuery((stemmedText:java))
> DisjunctionMaxQuery((stemmedText:0.0))
> DisjunctionMaxQuery((stemmedText:haskell))
> DisjunctionMaxQuery((stemmedText:0.0))
> DisjunctionMaxQuery((stemmedText:python))
> DisjunctionMaxQuery((stemmedText:0.0))
> DisjunctionMaxQuery((stemmedText:ruby))
> +DisjunctionMaxQuery((stemmedText:0.0))
> DisjunctionMaxQuery((stemmedText:program))
> DisjunctionMaxQuery((stemmedText:0.0))
> DisjunctionMaxQuery((stemmedText:"program language"))
> DisjunctionMaxQuery((stemmedText:0.0))
> DisjunctionMaxQuery((stemmedText:"code code"))
> DisjunctionMaxQuery((stemmedText:0.0))
> -DisjunctionMaxQuery((stemmedText:mobile))
> DisjunctionMaxQuery((stemmedText:0.0))
> -DisjunctionMaxQuery((stemmedText:android))
> DisjunctionMaxQuery((stemmedText:0.0))
> -DisjunctionMaxQuery((stemmedText:microsoft))
> DisjunctionMaxQuery((stemmedText:0.0))
> -DisjunctionMaxQuery((stemmedText:window))
> DisjunctionMaxQuery((stemmedText:0.0))) ()
> </str>
>
> Why is the "java" part marked mandatory (using the + notation)? It
> seems that these rewritings seem to happen when the queries get quite
> long, is there a way to prevent Solr from assuming I wanted "java" to
> be a mandatory term, or to deduce any mandatory fields at all?
>
> I've tried it with the ExtendedDismaxQParser and the DismaxQParser,
> both yield the same parsedquery.
>
> The LuceneQParser yielded the following:
> <str name="querystring">
> "java"^0.0 OR "haskell"^0.0 OR "python"^0.0 OR ("ruby"^0.0) AND
> (("programming"^0.0)) OR "programming language"^0.0 OR "code
> coding"^0.0 OR -"mobile"^0.0 OR -"android"^0.0 OR -"microsoft"^0.0 OR
> -"windows"^0.0
> </str>
> <str name="parsedquery">
> stemmedText:java^0.0 stemmedText:haskell^0.0 stemmedText:python^0.0
> +stemmedText:ruby^0.0 +stemmedText:program^0.0
> PhraseQuery(stemmedText:"program language"^0.0)
> PhraseQuery(stemmedText:"code code"^0.0) -stemmedText:mobile^0.0
> -stemmedText:android^0.0 -stemmedText:microsoft^0.0
> -stemmedText:window^0.0
> </str>
>
> Now, Solr thinks I want "ruby" (and program, the stemmed version of
> programming) to be mandatory... .
>
> I'm running Solr 3.5 on Linux 64bit.
>
> Any suggestions would be greatly appreciated,
> Michael
