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https://issues.apache.org/jira/browse/DERBY-2710?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Matrigali updated DERBY-2710:
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what is the expected result of a LIKE clause with mismatched collations. So
example is wher c1 like c2.
case 1) c1 is BASIC collation, c2 TERRITORY collation
case 2) c1 is TERRITORY collation, c2 is BASIC collation
should this just behave the same as where c1 = c2 with different collation
types, which I believe just throws an error.
> disable dynamic like optimization for collated databases
> --------------------------------------------------------
>
> Key: DERBY-2710
> URL: https://issues.apache.org/jira/browse/DERBY-2710
> Project: Derby
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 10.3.0.0
> Reporter: Mike Matrigali
> Assignee: Mike Matrigali
>
> I think Code needs to be added to
> opensource/java/engine/org/apache/derby/impl/sql/compile/LikeEscapeOperatorNode.java
> to disable like optimization for databases with non-default collation. There
> is left over code in this routine that says it disables it for national char
> by adding a cast to one of the two sides which I assume then stops some other
> code from considering the
> optimization.
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