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https://issues.apache.org/jira/browse/DERBY-534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13791345#comment-13791345
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ASF subversion and git services commented on DERBY-534:
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Commit 1530887 from [~knutanders] in branch 'code/trunk'
[ https://svn.apache.org/r1530887 ]
DERBY-534: Support use of the WHEN clause in CREATE TRIGGER statements
Reuse code for dependency checking of the triggered SQL statement for
checking dependencies in the WHEN clause.
Add test to verify that attempts to drop columns referenced in the WHEN
clause detect that the trigger is dependent on the columns.
> Support use of the WHEN clause in CREATE TRIGGER statements
> -----------------------------------------------------------
>
> Key: DERBY-534
> URL: https://issues.apache.org/jira/browse/DERBY-534
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Reporter: Kristian Waagan
> Assignee: Knut Anders Hatlen
> Priority: Minor
> Labels: derby_triage10_11
> Attachments: derby-534-01-a-syntax.diff,
> derby-534-02-a-refactor.diff, derby-534-03-a-npe-testcase.diff,
> derby-534-04-a-referencing.diff, derby-534-05-a-generated-cols.diff,
> derby-534-06-a-temptables.diff, derby-534-07-a-more-restrictions.diff,
> derby-534-08-a-test-invalidation.diff, derby-534-09-a-drop-column-deps.diff,
> derby-534-09-b-drop-column-deps.diff, parser.diff, WhenClause.html,
> WhenClause.html, WhenClause.html, WhenClause.html
>
>
> Support use of the WHEN clause in CREATE TRIGGER statements. The clause is
> described in the SQL standard (2003) in chapter "11.39 <trigger definition>"
> under "<triggered action>".
> There are traces in the code that suggests some work has been done on this
> earlier. If anyone knows something about this, please add a comment to this
> issue.
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