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From Øystein Grøvlen (JIRA) <j...@apache.org>
Subject [jira] Commented: (DERBY-2652) Clob.setCharacterStream differs between embedded and client driver
Date Wed, 16 May 2007 07:33:16 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2652?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12496215
] 

Øystein Grøvlen commented on DERBY-2652:
----------------------------------------

I would assume the behavior should be the same as for Clob.setString.  This isssue was raised
in DERBY-1286 and Lance presented the opinion of the expert group in the following thread:
http://www.nabble.com/-jira--Created%3A-%28DERBY-1286%29-Fill-in-Clob-methods-required-for-JDBC3-compliance-tf1553591.html#a4549524
This discussion indicates that the embedded has the right behavior.  (That is also similar
to the current client behavior for Blobs.)  

When using locators the client will forward the operation to the server.  Hence, this difference
should disappear when locators are enabled for Clobs.

--
Øystein


> Clob.setCharacterStream differs between embedded and client driver
> ------------------------------------------------------------------
>
>                 Key: DERBY-2652
>                 URL: https://issues.apache.org/jira/browse/DERBY-2652
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC
>    Affects Versions: 10.3.0.0
>            Reporter: Kristian Waagan
>         Attachments: ClobSetCharacterStreamTest.java
>
>
> Clob.setCharacterStream behaves differently depending on whether you use the embedded
or the client driver.
> Sample output from the repro:
> (embedded) Initial : 123456789
> (embedded) After   : 12__56789
> (client)   Initial : 123456789
> (client)   After   : 12__
> As can be seen, the client driver truncates the Clob value when it writes to it, whereas
the embedded driver does not and instead replaces existing characters with those written to
the character stream.
> (BTW: I know the title is not perfectly accurate, but it got so long when explaining
that it is when you actually write to the stream returned by Clob.setCharacterStream the result
differs.)

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