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Date: Fri, 7 Oct 2005 02:10:48 +0200 (CEST)
From: "Kathey Marsden (JIRA)" <derby-dev@db.apache.org>
To: derby-dev@db.apache.org
Subject: [jira] Commented: (DERBY-562) Derby incorrectly throws Exception when
 streaming to BLOB field
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    [ http://issues.apache.org/jira/browse/DERBY-562?page=comments#action_12331542 ] 

Kathey Marsden commented on DERBY-562:
--------------------------------------

Committed this to 10.1
Date: Thu Oct  6 16:52:27 2005
New Revision: 306964

URL: http://svn.apache.org/viewcvs?rev=306964&view=rev


> Derby incorrectly throws Exception when streaming to BLOB field
> ---------------------------------------------------------------
>
>          Key: DERBY-562
>          URL: http://issues.apache.org/jira/browse/DERBY-562
>      Project: Derby
>         Type: Bug
>   Components: JDBC
>     Versions: 10.1.1.0, 10.0.2.0, 10.0.2.1, 10.2.0.0, 10.1.2.0, 10.1.1.1, 10.0.2.2
>  Environment: All
>     Reporter: Holger Rehn
>     Assignee: Sunitha Kambhampati
>      Fix For: 10.2.0.0, 10.1.2.0
>  Attachments: Derby562.diff.txt, Derby562.stat.txt
>
> Derby incorrectly throws an Exception when streaming to a BLOB in case the used InputStream actually could provide more data than I want to write to the BLOB field.
>    PreparedStatement statement = connection.prepareStatement( "insert into FOO(ID,DATA) values(?, ?)" );
>    statement.setLong( 1, someValue );
>    statement.setBinaryStream( 2, someInputStream, amountOfData ); // amountOfData < amount of data readable from someInputStream
>    statement.executeUpdate();
> executeUpdate() throws an SQLException with detail message: "Input stream held less data than requested length.: java.io.IOException"
> In my case this was first caused by writing an internal buffer (byte[]) to the data base through a ByteArrayInputStream while not limiting the ByteArrayInputStream to the useful data within the buffer but setting amountOfData to the number of useful bytes. So the 2 problems are:
> 1. the error text is definitly incorrect since I provide more data than neccessary, not less
> 2. in my opinion this shouldn't throw an exception at all (I checked against 4 other DBMS, all of them worked as intended)

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