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From "V.Narayanan (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DERBY-2764) Streams returned using Clob.getAsciiStream() and Clob.getCharacterStream() should reflect the changes made to the underlying Clob.
Date Tue, 05 Jun 2007 14:17:26 GMT

    [ https://issues.apache.org/jira/browse/DERBY-2764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12501569
] 

V.Narayanan commented on DERBY-2764:
------------------------------------

I have not written a reproducible for this as yet. I will write this and post it tommorrow.

> Streams returned using Clob.getAsciiStream() and Clob.getCharacterStream() should reflect
the changes made to the underlying Clob.
> ----------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-2764
>                 URL: https://issues.apache.org/jira/browse/DERBY-2764
>             Project: Derby
>          Issue Type: Bug
>          Components: Network Client
>    Affects Versions: 10.3.0.0
>            Reporter: V.Narayanan
>             Fix For: 10.3.0.0
>
>
> Currently the Embedded and Network Client would differ 
> in behaviour when the following series of steps is 
> followed.
> a) Create an empty Clob (Using Connnection.createClob())
> b) get an InputStream using Clob.getAsciiStream()
> c) write data into this Clob
>    c.1) Get an OutputStream
>    c.2) Use OutputStream.write(byte [] b) to write
>         into this Clob.
> d) Now read from the InputStream obtained in step b)
>    and print the number of bytes read as output.
> The output of step d) differs in the client and in the Embedded side.
> In the Client
> -------------
> The number of bytes read would always be -1.
> In the Embedded
> ---------------
> The number of bytes would be the number of bytes we
> reflected.
> The above behaviour in the NetworkClient is because
> the length of the Clob is read once and stored in the 
> constructor of the locator Stream returned (in the 
> attribute maxPos).
> This instead should be read each time we use the streams.

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