[ https://issues.apache.org/jira/browse/DERBY-534?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Knut Anders Hatlen updated DERBY-534:
-------------------------------------

    Attachment: WhenClause.html
                derby-534-07-a-more-restrictions.diff

Attaching a new revision of the functional specification, which adds some more restrictions on what's allowed in a WHEN clause. These are restrictions that already exist for the WHERE clause or for the triggered SQL statement.

The patch derby-534-07-a-more-restrictions.diff implements the restrictions by adding checks that verify that the WHEN clause does not contain dynamic parameters, and that its expression evaluates to a BOOLEAN.

> 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, 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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