To use the DELETE STORAGE MAP statement to delete a storage map
    for a relation, you must have the Oracle Rdb DELETE privilege to the
    relation.

    You cannot delete a storage map that refers to a relation that
    contains data. If you attempt to do so, you will receive an error
    message. If a relation is deleted, the underlying storage map is
    also deleted.

    You must execute this statement in a read/write transaction.
    If there is no active transaction and you issue this statement,
    Oracle Rdb starts a read/write transaction implicitly.

    Other users are allowed to be attached to the database when you
    issue the DELETE STORAGE MAP statement.