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https://issues.apache.org/jira/browse/DERBY-6423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14165285#comment-14165285
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ASF subversion and git services commented on DERBY-6423:
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Commit 1630516 from [email protected] in branch 'code/branches/10.10'
[ https://svn.apache.org/r1630516 ]
DERBY-6423: The expression syntax in CASE's THEN clause doesn't accept boolean
value expression
backported change #r1592465 from trunk to 10.10 branch.
Allow boolean value expressions in CASE and NULLIF expressions.
> The expression syntax in CASE's THEN clause doesn't accept boolean value
> expression
> -----------------------------------------------------------------------------------
>
> Key: DERBY-6423
> URL: https://issues.apache.org/jira/browse/DERBY-6423
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Reporter: Dag H. Wanvik
> Assignee: Mike Matrigali
> Fix For: 10.11.1.1
>
> Attachments: d6423-1a.diff
>
>
> This syntax gives an error:
> {noformat}
> > VALUES CASE WHEN 1=1 THEN (1=2) OR (3!=4) ELSE true END;
> ERROR 42X01: Syntax error: Encountered "OR" at line 1, column 33.
> {noformat}
> However, this works:
> {noformat}
> > VALUES CASE WHEN 1=1 THEN ((1=2) OR (3!=4)) ELSE true END;
> 1
> -----
> true
> 1 row selected
> {noformat}
> According to the standard, the syntax after THEN should be <result>:
> {noformat}
> <result> ::=
> <result expression>
> | NULL
> <result expression> ::=
> <value expression>
> {noformat}
> which should give us the full value syntax. sqlgrammar.jj uses the
> corresponding production "thenElseExpression" which allows NULL or
> aditiveExpression. I believe it should be orExpression.
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