CREATE CLUSTER [ schema. ] cluster
  (column datatype [ SORT ]
    [, column datatype [ SORT ] ]...
  )
  [ { physical_attributes_clause
    | SIZE size_clause
    | TABLESPACE tablespace
    | { INDEX
      | [ SINGLE TABLE ]
        HASHKEYS integer [ HASH IS expr ]
      }
    }...
  ]
  [ parallel_clause ]
  [ NOROWDEPENDENCIES | ROWDEPENDENCIES ]
  [ CACHE | NOCACHE ] ;