Dag H. Wanvik created DERBY-6423:
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Summary: 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
This syntax gives an error:
> 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.
However, this works:
> VALUES CASE WHEN 1=1 THEN ((1=2) OR (3!=4)) ELSE true END;
According to the standard, the syntax after THEN should be <result>:
<result> ::=
<result expression>
| NULL
<result expression> ::=
<value expression>
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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