anchor.diff:  
   segment_attributes_clause
       : ( physical_attributes_clause
  -      | TABLESPACE tablespace_name=REGULAR_ID 
  +      | TABLESPACE tablespace_name=id_expression
         | logging_clause
         )+
       ;
  
positive.code:                         | ','? MAXVALUE
                          )+
                       ')'
                  (TABLESPACE partition_tablespace=REGULAR_ID)?
  
                  (ON COMMIT (DELETE | PRESERVE) ROWS)?
                  deferred_segment_creation? 
  
negative.code:     ;
  
  create_index
      : CREATE UNIQUE? INDEX index_name ON tableview_name paren_column_list (TABLESPACE id_expression)? (COMPUTE STATISTICS)? ';'
      ;
  
  alter_index
  