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https://issues.apache.org/jira/browse/SOLR-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13555085#comment-13555085
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Shawn Heisey commented on SOLR-2649:
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bq. Thank you! We have been waiting a long time for this fix.
I'm a little confused here. Were you talking to me? I don't have a fix, I was
just saying that I'm having the same problem, and that my problem is not
exactly like the initial description. The initial description says that when
boolean operators are present, edismax behaves as if mm=100%. I'm seeing the
opposite.
To summarize: When boolean operators are present in the query, two versions of
Solr are behaving as if I did not have mm=100%, q.op=AND, or
defaultOperator=AND in the schema. Both versions behave as if the default
operator is OR. For 3.5, I have tried all three of those options
simultaneously. For 4.1, I have tried just the first two, because
defaultOperator is deprecated.
> MM ignored in edismax queries with operators
> --------------------------------------------
>
> Key: SOLR-2649
> URL: https://issues.apache.org/jira/browse/SOLR-2649
> Project: Solr
> Issue Type: Bug
> Components: query parsers
> Reporter: Magnus Bergmark
> Priority: Minor
> Fix For: 4.2, 5.0
>
>
> Hypothetical scenario:
> 1. User searches for "stocks oil gold" with MM set to "50%"
> 2. User adds "-stockings" to the query: "stocks oil gold -stockings"
> 3. User gets no hits since MM was ignored and all terms where AND-ed
> together
> The behavior seems to be intentional, although the reason why is never
> explained:
> // For correct lucene queries, turn off mm processing if there
> // were explicit operators (except for AND).
> boolean doMinMatched = (numOR + numNOT + numPluses + numMinuses) == 0;
> (lines 232-234 taken from
> tags/lucene_solr_3_3/solr/src/java/org/apache/solr/search/ExtendedDismaxQParserPlugin.java)
> This makes edismax unsuitable as an replacement to dismax; mm is one of the
> primary features of dismax.
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