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https://issues.apache.org/jira/browse/SOLR-3145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13228495#comment-13228495
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Jan Høydahl commented on SOLR-3145:
-----------------------------------
It is no surprise that you get better recall with OR - and thus find certain
documents related to one of the terms which do not contain all terms. That's
ABC and you don't need to prove that. But that is not the same as assuming that
most Solr users prefer OR over AND. People seem to have been happy with
"/browse" being AND for the past years, so why change now?
> Velocity /browse GUI should stick to AND as defaultOperator
> -----------------------------------------------------------
>
> Key: SOLR-3145
> URL: https://issues.apache.org/jira/browse/SOLR-3145
> Project: Solr
> Issue Type: Improvement
> Components: web gui
> Affects Versions: 4.0
> Reporter: Jan Høydahl
> Assignee: Jan Høydahl
> Fix For: 4.0
>
>
> After SOLR-1889 was committed, the DisMax "mm" parameter defaults to whatever
> set in q.op. Since defaultOperator in schema.xml is OR, this means that
> DisMax now defaults to OR (mm=0) instead of the old default (mm=100%). It
> should stick to AND as before.
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