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Posted to derby-dev@db.apache.org by "Kristian Waagan (JIRA)" <ji...@apache.org> on 2012/04/26 09:27:22 UTC
[jira] [Resolved] (DERBY-5489) getBinary() returns incorrect data
after getObject() call on BLOB column
[ https://issues.apache.org/jira/browse/DERBY-5489?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kristian Waagan resolved DERBY-5489.
------------------------------------
Resolution: Fixed
Fix Version/s: 10.9.0.0
Issue & fix info: Repro attached (was: Repro attached,Patch Available)
Committed patch 2b to trunk with revision 1330681.
Unless something new comes up, I don't plan more work on this issue.
> 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
> Assignee: Kristian Waagan
> Labels: derby_triage10_9
> Fix For: 10.9.0.0
>
> Attachments: SelectBlobBug.java, derby-5489-1a-test.diff, derby-5489-1b-test.diff, derby-5489-2a-fixes.diff, derby-5489-2b-fixes.diff, 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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