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https://issues.apache.org/jira/browse/SOLR-4646?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13620865#comment-13620865
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Jack Krupansky commented on SOLR-4646:
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bq. up to 4.2 you get one behavior, and after that you get a different one
Hmmm... I would think that as a general proposition, intentional, incompatible
behavior changes should be limited to major releases of trunk, and not to dot
releases, where the expectation is that existing apps should still "just work"
unless the issue is clearly a bug. In this case, sure, some people consider it
a bug, but the reality is that they just don't like the default for some cases.
So, if you want to propose this "improvement" for trunk, 5.0, fine. But I don't
think it is appropriate to change the rules of the road in a dot release -
unless it is a compelling, global problem - which it doesn't appear to be. I
mean, the subset of apps that do have an issue with this have a very simple
workaround (set lowercaseOperators to false in "defaults" in their query
request handler.)
And to be clear, support for lower case operators is an intentional feature.
Granted, not everyone agrees, now.
> lowercaseOperators is enabled by default for edismax query parser
> -----------------------------------------------------------------
>
> Key: SOLR-4646
> URL: https://issues.apache.org/jira/browse/SOLR-4646
> Project: Solr
> Issue Type: Bug
> Components: query parsers
> Affects Versions: 4.1, 4.2
> Reporter: Alexander Koval
>
> [Documentation|http://wiki.apache.org/solr/ExtendedDisMax#lowercaseOperators]
> says:
> *lowercaseOperators*
> This param controls whether to try to interpret lowercase words as boolean
> operators such as "and", "not" and "or". Set {{&lowercaseOperators=true}} to
> allow this. Default is {{"*false*"}}.
> But in fact {{lowercaseOperators=true}} by default.
> And if one of boolean operators in lowercase is present in query it turns off
> {{mm}} parameter:
> * {{q=Young+6+or+Ariston&defType=edismax&qf=name&mm=100%25&debugQuery=true}}
> {{"parsedquery_toString": "+((name:young) (name:6) (name:ariston))"}}
> *
> {{q=Young+6+or+Ariston&defType=edismax&qf=name&mm=100%25&lowercaseOperators=false&debugQuery=true}}
> {{"parsedquery_toString": "+(((name:young) (name:6) (name:ariston))~3)"}}
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