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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-3069) Derby does not resolve functions bound to methods with varargs.
Date Fri, 02 Nov 2012 13:27:13 GMT

    [ https://issues.apache.org/jira/browse/DERBY-3069?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13489419#comment-13489419
] 

Knut Anders Hatlen commented on DERBY-3069:
-------------------------------------------

Using a special parameter style to enable this functionality sounds fine to me. That's the
same thing we do for table functions, and it would prevent conflicts with future standardization
in this area.

As to item 3 above, I'd suggest that we go for option 3a in the first iteration, and revisit
it when we have more experience with how vararg functions are used.
                
> 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
>              Labels: derby_triage10_10
>         Attachments: derby-3069-01-varargs-aa.diff, derby-3069-01-varargs-ab.diff, derby-3069-02-backout.diff,
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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