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https://issues.apache.org/jira/browse/SOLR-2649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15038767#comment-15038767
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Yonik Seeley commented on SOLR-2649:
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bq. I view current behavior as a bug
A bug in the idea? That's not traditionally what we refer to as a bug unless
it was unintended.
This would not qualify to go in a bugfix-only release, etc. I'm guessing
you're using the term loosely, as in "I wouldn't have made the same design
decisions". That's fine, and can be changed. But I don't think we should be
redefining terminology toward that end and calling things we don't agree with
"bugs".
> MM ignored in edismax queries with operators
> --------------------------------------------
>
> Key: SOLR-2649
> URL: https://issues.apache.org/jira/browse/SOLR-2649
> Project: Solr
> Issue Type: Improvement
> Components: query parsers
> Reporter: Magnus Bergmark
> Assignee: Erick Erickson
> Fix For: 4.9, Trunk
>
> Attachments: SOLR-2649-with-Qop.patch, SOLR-2649-with-Qop.patch,
> SOLR-2649.diff, SOLR-2649.patch
>
>
> 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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