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https://issues.apache.org/jira/browse/DERBY-5489?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13228447#comment-13228447
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Kristian Waagan commented on DERBY-5489:
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I've been talking to Lance Anderson, the JDBC spec lead, and the intention is
to specify that getBytes is supported on BLOB columns in a future
release/update of the JDBC specification. The same goes for getString on CLOB
columns. The recommended way to access a BLOB is still through getBlob.
This makes it clear that we must allow getBytes on BLOB columns, but the
existing restriction we have on calling a getter only once on a LOB column will
still be there.
Knut, the answer to your question is definitely yes :)
> getBinary() returns incorrect data after getObject() call on BLOB column
> ------------------------------------------------------------------------
>
> Key: DERBY-5489
> URL: https://issues.apache.org/jira/browse/DERBY-5489
> Project: Derby
> Issue Type: Bug
> Components: JDBC
> Affects Versions: 10.7.1.1, 10.8.2.2
> Reporter: Pawel Fronczak
> Labels: derby_triage10_9
> Attachments: SelectBlobBug.java, repro.diff
>
>
> When ResultSet.getObject(int) is called on a BLOB column, the correct
> EmbedBlob object is returned. But if afterwards the ResultSet.getBytes(int)
> is called on the same row, the returned array contains invalid data - it is
> offset by 3 bytes and its size is incorrect.
> The problem only occurs when the stored BLOB is large enough to be internally
> represented by stream and not by array of bytes (at least ~32KiB).
> It seems that the getObject method shifts the stream position and therefore
> the getBytes method starts to read the data after the third byte, thus
> incorrectly calculating its length.
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