db-derby-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6423) The expression syntax in CASE's THEN clause doesn't accept boolean value expression
Date Sat, 30 Nov 2013 16:38:35 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6423?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13835775#comment-13835775
] 

Knut Anders Hatlen commented on DERBY-6423:
-------------------------------------------

We fixed some similar problems in DERBY-5972. CASE expressions were discussed, but only the
WHEN clause. The THEN and ELSE clauses were overlooked, apparently.

> 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;
>     1    
>     -----
>     true 
>     1 row selected
> 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.



--
This message was sent by Atlassian JIRA
(v6.1#6144)

Mime
View raw message