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From "Yun Lee (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2769) Implement error handling/parameter checking in Clob.setString
Date Sun, 29 Mar 2009 04:28:51 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2769?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12693515#action_12693515
] 

Yun Lee commented on DERBY-2769:
--------------------------------

> myClob.setString(0, "bryan", 0, 0); 
It's not supported by the current function.

>I think you may get into trouble with that one due to the invalid insert position, but
I guess this should work (and return zero): 
>myClob.setString(1, "bryan", 0, 0);
It's supported.

As to the 'empty String' I mentioned, I should do some clarificaiton. I just meant 'empty
String ' as '', a  Stirng with zero length. And It should be accepted, as some test cases
have adopted this way.



> Implement error handling/parameter checking in Clob.setString
> -------------------------------------------------------------
>
>                 Key: DERBY-2769
>                 URL: https://issues.apache.org/jira/browse/DERBY-2769
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>    Affects Versions: 10.3.1.4
>            Reporter: Kristian Waagan
>            Assignee: Yun Lee
>         Attachments: DERBY-2769-1.patch, DERBY-2769-1.stat
>
>
> The error handling, or parameter checking, in Clob.subString is not adequate.
> There are four parameters that can be invalid;
>  * pos
>  * str
>  * offset
>  * len
> The first one is already handled properly, the remaining three are not. They typically
result in some low-level exception like a NPE.
> I have not found anything in the JDBC specification nor JavaDoc that dictates the behavior,
except for that SQLException should use states defined in the SQL 2003 specification. A brief
search there resulted in the following possibilities:
>  22003 - numeric value out of range
>  22004 - null value not allowed
>  2200F - zero-length character string
>  22011 - substring error 
>  22023 - invalid parameter value
> Some of these are already defined by Derby, but with unsuitable or very specific error
messages.

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