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https://issues.apache.org/jira/browse/DERBY-534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13796506#comment-13796506
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ASF subversion and git services commented on DERBY-534:
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Commit 1532666 from [~knutanders] in branch 'code/trunk'
[ https://svn.apache.org/r1532666 ]
DERBY-534: Support use of the WHEN clause in CREATE TRIGGER statements
Fix incorrect null check when merging subqueryTrackingArray and
materializedSubqueries in GenericStatementContext.setTopResultSet().
Used to cause NullPointerException in some cases when a WHEN clause
contained a subquery.
Add more tests for scalar subqueries in WHEN clauses.
> 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,
> 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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