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https://issues.apache.org/jira/browse/DERBY-5578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13286383#comment-13286383
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Knut Anders Hatlen commented on DERBY-5578:
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I don't see any reason why we'd want to deny the DBO's granting the execute 
permission on this procedure, so +1 to keeping it in SYSCS_UTIL.

I think you're right that only meta-data queries and triggers are stored in 
SYSSTATEMENTS. It looks like there used to be syntax for CREATE STATEMENT, 
which allowed user-defined queries to be stored there too, but that syntax is 
disabled now.
                
> Provide a way to invalidate stored prepared statements
> ------------------------------------------------------
>
>                 Key: DERBY-5578
>                 URL: https://issues.apache.org/jira/browse/DERBY-5578
>             Project: Derby
>          Issue Type: Improvement
>          Components: Services
>            Reporter: Kathey Marsden
>            Assignee: Mamta A. Satoor
>         Attachments: DERBY5578_patch1_diff.txt
>
>
> In various support situations I have seen problems with JDBC metadata stored 
> prepared statements or trigger stored prepared statements that need to be 
> invalidated.  It would be nice to have a way to do this in the field.  For 
> 10.9 a stored procedure would make most sense, but it would be good to have 
> something available in the release branches too.

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