: Solr/Lucene. I am in a situation where I think that I can improve the
: quality of the LikeThis-documents significantly by restricting the
: MoreLikeThis-query to documents where one field has its term in a
: specified range. That is, I would like to add a RangeQuery to the
: default MoreLikeThis query.
[...]
: I would like to also add a range restriction as,
:
: rq = new
ConstantScoreRangeQuery("time",startTimeString,endTimeString,true,true);
: query.add(rq, BooleanClause.Occur.MUST);
:
: This is all made in
: contrib/queries/src/java/org/apache/lucene/search/similar/MoreLikeThis.java
:
: However, this does not work at all when running from Solr (no MLT
: suggestions are returned). I suspect that the problem is that the
If i'm understanding you correctly, you modified the MoreLikeThis class to
include your new clause (using those two lines above) correct?
If you aren't getting any results, i suspect it may be an issues of term
value encoding ... is your "time" field a Solr DateField? what is the
value of startTimeString and endTimeString? ... if you replace all of the
MLT Query logic so that it's *just* the ConstantScoreRangeQuery do you get
any results?
: does not perform a standard query, but a getDocList:
:
: results.docList = searcher.getDocList(mltQuery, filters, null,
: start, rows, flags);
:
: and that this type of query does not handle a RangeQuery. Is this
: correct, or what is the problem with adding a RangeQuery? Should it be
a RangeQuery will work just fine. but in general the type of problem you
are trying to solve could be more generally dealt with if the MLT code had
a way to let people specify "filter" queries (like the existing "fq"
param) to be applied tothe MLT logic -- that way they wouldn't contribute
to the relevancy ... it seems like it would be pretty easy to add a
"mlt.fq" param for this purpose if you wanted to appraoch the problem
thatway as a more generic path -- but i'm not too familiar with the MLT
code to say for certain waht would be required, and I know the code is
probably more complicated then it should be with the MoreLikeThisHandler
and the MoreLikeThisComponent (i think there's a MoreLikeThisHelper that
they share or something)
-Hoss
