The Qdabra DBXL Administration Tool (DAT) allows you to quickly reshred all documents from a document type:
1. Open the configuration for the document type by clicking the Edit icon
2. Select the Documents tab and click on the Reshred All button.
However, you may encounter an error due to timeout if your document type contains too many documents (usually in the order of thousands).
The good news is that you can use Document Deployer to reshred a large number of documents. The tool reshreds the documents one by one so that the timeout does not occur.