[jira] [Commented] (DERBY-7139) Boolean expressions cannot be passed to COALESCE function

["Richard N. Hillegas (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DERBY-7139?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17542091#comment-17542091 ] 

Richard N. Hillegas commented on DERBY-7139:
--------------------------------------------

I am able to reproduce your results. I agree that this looks like a parser bug.

> Boolean expressions cannot be passed to COALESCE function
> ---------------------------------------------------------
>
>                 Key: DERBY-7139
>                 URL: https://issues.apache.org/jira/browse/DERBY-7139
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.15.2.0
>            Reporter: Lukas Eder
>            Priority: Major
>
> While this parses just fine:
> {code}
> values(
>   nullif(
>     1 = 0,
>     exists(values(1))
>   )
> );
> {code}
> This doesn't work:
> {code}
> values(
>   coalesce(
>     1 = 0,
>     exists(values(1))
>   )
> );
> {code}
> Resulting in:
> bq. SQL Error [30000] [42X01]: Syntax error: Encountered "=" at line 3, column 7.
> The workaround is to wrap both arguments in parentheses
> {code}
> values(
>   coalesce(
>     (1 = 0),
>     (exists(values(1)))
>   )
> );
> {code}
> I don't think there's a good reason for this limitation, so I'm guessing it's a parser bug?



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