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
