MODIFY PARTITION partition
{ { physical_attributes_clause
  | { LOGGING | NOLOGGING }
  | deallocate_unused_clause
  | allocate_extent_clause
  } 
  [ physical_attributes_clause
  | { LOGGING | NOLOGGING }
  | deallocate_unused_clause
  | allocate_extent_clause
  ]...
| PARAMETERS ( 'alter_partition_params' )
| COALESCE
| UPDATE BLOCK REFERENCES  
| UNUSABLE
}

For information on the symbols and conventions of Backus-Naur Form (BNF) syntax, see Appendix A.