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https://issues.apache.org/jira/browse/SOLR-3145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13228371#comment-13228371
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Jan Høydahl commented on SOLR-3145:
-----------------------------------
Another thing - ALL applications that want to do sorting should care about the
precision of their search. If there are 100 relevant docs for a given query,
say {{q=sports car}}, and your result set returns 1000 docs since you use
q.op=OR, then you may very well get the best sports cars on top, but try
sorting by date, price, popularity or anything other than "score" and your
results are crap because you only paid attention to search recall, not to
precision. It's like a scale - gain one and you lose the other.
> 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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