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From "Daniel John Debrunner (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-3069) Derby does not resolve functions bound to methods with varargs.
Date Wed, 12 Sep 2007 17:54:32 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12526868
] 

Daniel John Debrunner commented on DERBY-3069:
----------------------------------------------

Question though, is the varargs just syntax at the Java language level or is the information
propagated all the way to the class file?

If it's just at the java compiler level then Derby could not implement it as it would be impossible
to distinguish between a varargs method and one declared with the corresponding array type.
  x(String ... args) and x(String[] args) [not even sure how Java handles this]

>From a very quick look at java.lang.reflect I couldn't see any mechanism to determine
if a method to a parameter was a varargs one, though I could have missed it.




> Derby does not resolve functions bound to methods with varargs.
> ---------------------------------------------------------------
>
>                 Key: DERBY-3069
>                 URL: https://issues.apache.org/jira/browse/DERBY-3069
>             Project: Derby
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 10.0.2.0, 10.0.2.1, 10.1.1.0, 10.1.2.1, 10.1.3.1, 10.2.1.6, 10.2.2.0,
10.3.1.4
>            Reporter: Rick Hillegas
>         Attachments: z.java, z.sql
>
>
> Varargs were added in Java 5. It would be nice if Derby let you invoke a function bound
to a method with a variable length argument list. The Reference Guide states a small number
of restrictions for methods which can be invoked as Derby functions: They must be public,
static, and not have arguments which are long datatypes. I see no reason that Derby shouldn't
be able to resolve and invoke functions which are bound to methods which don't suffer these
limitations but which have variable argument lists.

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