Markus Jelsma created SOLR-13009:
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Summary: ExtendedSolrQueryParser cannot handle with KeywordRepeat,
Synonyms and minShouldMatch
Key: SOLR-13009
URL: https://issues.apache.org/jira/browse/SOLR-13009
Project: Solr
Issue Type: Bug
Security Level: Public (Default Security Level. Issues are Public)
Components: query parsers
Affects Versions: 7.5
Reporter: Markus Jelsma
Fix For: master (8.0)
As described on the mailing list [1].
Consider this example synonym set [bier,brouw] where bier means beer and brouw
is the stemmed version of brouwsel (brewage, concoction), and consider these
parameters on /select:
{code}qf=content_nl&defType=edismax&mm=2<-1 5<-2 6<90%25{code}
The queries q=bier and q=brouw both give the desired results. However, for
q=brouwsel something (partially) unexpected happens:
{code}+(((content_nl:brouwsel Synonym(content_nl:bier
content_nl:brouw))~2)){code}
This results in a BooleanQuery where, due to mm=2, both clauses need to match,
giving very few matches. Removing KeywordRepeat or setting mm=1 of course fixes
the problem, but that is not what we want.
Will shortly attatch a patch containing a unit test proving the problem is real.
[1]
http://lucene.472066.n3.nabble.com/KeywordRepeat-stemming-single-term-synonyms-and-minimum-should-match-edismax-td4413690.html
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