I'm afraid that Sqoop currently do not exposes interface for calling TRUNCATE prior exporting data. Please don't hesitate and file a new feature request JIRA if it's not filled already!
On Mon, Sep 30, 2013 at 03:34:30PM +0000, Martin, Nick wrote:
> Hi all - is there a method by which I could perform a TRUNCATE before import/export in Sqoop?
> I've seen it suggested a Jira be created for this functionality but not sure if it made it into a release...