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https://issues.apache.org/jira/browse/SOLR-1889?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hoss Man resolved SOLR-1889.
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Assignee: Hoss Man
Fix Version/s: 4.0
(was: Next)
Resolution: Fixed
Committed revision 950710.
> Change default value of 'mm' param to depend on explicit/implicit value of
> q.op
> -------------------------------------------------------------------------------
>
> Key: SOLR-1889
> URL: https://issues.apache.org/jira/browse/SOLR-1889
> Project: Solr
> Issue Type: Improvement
> Components: search
> Reporter: Hoss Man
> Assignee: Hoss Man
> Fix For: 4.0
>
> Attachments: SOLR-1889.patch
>
>
> The 'mm' param for the dismax parser has always defaulted to 100%, but many
> first time users seem to expect that the default behavior of dismax should
> work similar to the standard QParser, and be influenced by the schema
> configured default query op, or the q.op query param.
> we should change the default value for "mm" to be equivalent to 100% if the
> derived value of "q.op" would be AND, and to be 1 if the derived value of
> "q.op" would be OR. We should document this in CHANGES.txt so people who are
> upgrading know that if they have q.op=OR, but they still want a default mm
> value of 100%, they should add it as a configured default for their request
> handlers.
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