tMDMRollback
Rolls back any changes made in the database rather than definitively committing them, for example to prevent partial commits if an error occurs.
tMDMRollback returns a database to its original state before a Job was run, instead of committing any changes.
This component is not shipped with your Talend Studio by default. You need to install it using the Feature Manager. For more information, see Installing features using the Feature Manager.