anchor.diff:      ;
   
   permanent_tablespace_clause
  -    : TABLESPACE REGULAR_ID datafile_specification? 
  +    : TABLESPACE id_expression datafile_specification? 
           ( MINIMUM EXTENT size_clause
           | BLOCKSIZE size_clause
           | logging_clause
  
positive.code: create_materialized_view_log
      : CREATE MATERIALIZED VIEW LOG ON tableview_name
          ( ( physical_attributes_clause
            | TABLESPACE tablespace_name=REGULAR_ID
            | logging_clause
            | (CACHE | NOCACHE)
            )+
  
negative.code:                         | ','? MAXVALUE
                          )+
                       ')'
                  (TABLESPACE partition_tablespace=id_expression)?
  
                  (ON COMMIT (DELETE | PRESERVE) ROWS)?
                  deferred_segment_creation? 
  