specifies the name
of an existing cluster table to undo.
Details
Use CLUSTER UNDO when
you want to destroy the metadata that is associated with a cluster,
but want to keep the source tables.
Example
This CLUSTER UNDO statement
reverts the cluster Sales_History back to its original tables. Undoing
the cluster frees you to create a new cluster table named Sales_History
with a new set of member tables. Meanwhile, the original tables continue
to exist.