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https://issues.apache.org/jira/browse/CAY-1210?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12979519#action_12979519
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Ari Maniatis commented on CAY-1210:
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I'd like to solve this one since it also affects other database types and is a
bit of a performance issue for us right now. What about this as a solution:
* Add new column to Cayenne modeler in the dbAttribute called "case sensitive".
It is a checkbox which is ticked by default (to preserve existing behaviour).
* Change the SQL generator to not spit out UPPER for those fields
> mysql does not use index for case insensitive searches
> ------------------------------------------------------
>
> Key: CAY-1210
> URL: https://issues.apache.org/jira/browse/CAY-1210
> Project: Cayenne
> Issue Type: Improvement
> Components: Database integration
> Reporter: Ari Maniatis
> Assignee: Ari Maniatis
> Fix For: 3.1M1
>
>
> When performing a case insensitive search Cayenne spits out SQL which looks
> like this
> SELECT .... WHERE upper(name) LIKE upper("fred")
> This prevents any index being used for the search. Since mysql already
> performed case insensitive searches on text fields we need to suppress the
> 'upper' functions being used in these situations. All searches on these
> fields are already case insensitive.
> http://dev.mysql.com/doc/refman/5.0/en/case-sensitivity.html
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