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https://issues.apache.org/jira/browse/DERBY-2496?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12498563
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Knut Anders Hatlen commented on DERBY-2496:
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> Due to a problem with JDBC 4 drivers, the patch treat all errors
> during execution of a stored procedure this way. This is because for
> JDBC 4, the actual error is not propagated to the server. I have
> tried to find a way to fix that, but have decided to wait for the
> changes that Knut Anders has announced in DERBY-2472 to see if that
> may improve things.
I think this is DERBY-1440, for which I have uploaded a patch you
could test.
> Implement Blob support for Locators
> -----------------------------------
>
> Key: DERBY-2496
> URL: https://issues.apache.org/jira/browse/DERBY-2496
> Project: Derby
> Issue Type: Sub-task
> Components: Network Server
> Reporter: Øystein Grøvlen
> Assigned To: Øystein Grøvlen
> Attachments: blob-followup.diff, blob-followup_v2.diff,
> blob-followup_v2.diff, blob.diff, blob_v2.diff, blobtestfix.diff,
> enableblobloc.diff
>
>
> DERBY-2347 adds the possibility to send locators between client and server
> instead of LOB values. This has not been activated yet, since the client
> implementation does not currently support locators. This report is for
> supporting the locators for Blob objects. Another JIRA issue will be made
> for Clob.
> This work will be made in several steps:
> 1. Blob methods and ResultSet.getXXX methods
> 2. PreparedStatement and CallableStatement methods
> 3. ResultSet.updateXXX methods
> 4. Connection.createBlob()
> There is dependencies between these steps and it might be that the Locator
> implementation cannot be exposed until everything has been done. At least,
> doing just step 1, gives testing errors because tests use Blobs fetched from
> DB as parameters to prepared statements. I would guess tests for updatable
> result sets, needs the combination of 1. and 3.
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