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https://issues.apache.org/jira/browse/SOLR-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13199259#comment-13199259
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Jan Høydahl commented on SOLR-2649:
-----------------------------------
Yes I think the key here is what terms are part of some user imposed operator
(forced MUST or MUST NOT) vs what terms are left dangling in the wild to be
subject to mm. But what about this
{noformat}
q=word1 AND word2 (word3 OR word4) word5%mm=100%
{noformat}
Should this be interpreted as MUST have word1 AND word2 and set mm=3 for word3,
word4, word5? Don't think so. An OR does not mean the same as a "loose" term.
This would clearly (perhaps because of the parens) signal that word3 OR word4
should be treated as one unit, not requiring both of them?
> 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: search
> Affects Versions: 3.3
> Reporter: Magnus Bergmark
> Priority: Minor
>
> 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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