ALTER STATISTICS — change the definition of an extended statistics object
ALTER STATISTICSnameOWNER TO {new_owner| CURRENT_USER | SESSION_USER } ALTER STATISTICSnameRENAME TOnew_nameALTER STATISTICSnameSET SCHEMAnew_schema
   ALTER STATISTICS changes the parameters of an existing
   extended statistics object.  Any parameters not specifically set in the
   ALTER STATISTICS command retain their prior settings.
  
   You must own the statistics object to use ALTER STATISTICS.
   To change a statistics object's schema, you must also
   have CREATE privilege on the new schema.
   To alter the owner, you must also be a direct or indirect member of the new
   owning role, and that role must have CREATE privilege on
   the statistics object's schema.  (These restrictions enforce that altering
   the owner doesn't do anything you couldn't do by dropping and recreating
   the statistics object.  However, a superuser can alter ownership of any
   statistics object anyway.)
  
nameThe name (optionally schema-qualified) of the statistics object to be altered.
new_ownerThe user name of the new owner of the statistics object.
new_nameThe new name for the statistics object.
new_schemaThe new schema for the statistics object.
   There is no ALTER STATISTICS command in the SQL standard.