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https://issues.apache.org/jira/browse/DERBY-534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13805158#comment-13805158
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ASF subversion and git services commented on DERBY-534:
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Commit 1535654 from [~knutanders] in branch 'code/trunk'
[ https://svn.apache.org/r1535654 ]
DERBY-534: Support use of the WHEN clause in CREATE TRIGGER statements
Remove logic in the readExternal() and writeExternal() methods of
TriggerInfo and TriggerDescriptor that was originally put there for
compatibility between different Derby versions. Since these objects
are only persisted as part of a stored prepared statement, and Derby
always clears all stored prepared statements on version change, there
is no requirement that TriggerInfo and TriggerDescriptor instances
written by one Derby version must be possible to read by other Derby
versions.
> 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, derby-534-10-a-get-sps.diff,
> derby-534-11-a-more-tests.diff, derby-534-12-a-subquery-npe.diff,
> derby-534-13-a-dblook.diff, derby-534-14-a-remove-formatable-upgrade.diff,
> parser.diff, WhenClause.html, 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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