anchor.diff:      ;
   
   autoextend_clause
  -    : AUTOEXTEND (OFF| ON (NEXT size_clause)? maxsize_clause? )
  +    : AUTOEXTEND (OFF | ON (NEXT size_clause)? maxsize_clause? )
       ;
   
   maxsize_clause
  -    : MAXSIZE (UNLIMITED|size_clause)
  +    : MAXSIZE (UNLIMITED | size_clause)
       ;
   
   create_table
  
positive.code:         | BLOCKSIZE size_clause
          | logging_clause
          | FORCE LOGGING
          | (ONLINE|OFFLINE)
          | ENCRYPTION tablespace_encryption_spec
          | DEFAULT //TODO table_compression? storage_clause?
          | extent_management_clause
  
negative.code:     ;
  
  create_tablespace
      : CREATE (BIGFILE | SMALLFILE)? 
          ( permanent_tablespace_clause
          | temporary_tablespace_clause
          | undo_tablespace_clause
  