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From "Sunitha Kambhampati (JIRA)" <derby-...@db.apache.org>
Subject [jira] Updated: (DERBY-562) Derby incorrectly throws Exception when streaming to BLOB field
Date Wed, 21 Sep 2005 03:27:28 GMT
     [ http://issues.apache.org/jira/browse/DERBY-562?page=all ]

Sunitha Kambhampati updated DERBY-562:
--------------------------------------

    Attachment: Derby562.stat.txt

> 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
>     Versions: 10.1.1.0
>     Reporter: Holger Rehn
>  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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