Change default value of 'mm' param to depend on explicit/implicit value of q.op
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Key: SOLR-1889
URL: https://issues.apache.org/jira/browse/SOLR-1889
Project: Solr
Issue Type: Improvement
Components: search
Reporter: Hoss Man
Fix For: 1.5
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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