[jira] [Closed] (CAY-1210) mysql does not use index for case insensitive searches

["Andrus Adamchik (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CAY-1210?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrus Adamchik closed CAY-1210.
--------------------------------

    Resolution: Fixed

Both 3.1 and 3.2 support 'cayenne.runtime.db.collation.assume.ci'. It was committed on Sept 14, 2011, i.e. after the patches. So I added it ti old release notes, and now closing the issue. If there's anything else we need to do, let's jira it separately.

> 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: 3.1 (final)
>
>         Attachments: case-insensitive-search.patch, case-insensitive-search.patch
>
>
> 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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