anchor.diff:      ;
   
   undo_tablespace_clause
  -    : UNDO TABLESPACE tablespace_name=REGULAR_ID
  +    : UNDO TABLESPACE tablespace_name=id_expression
           datafile_specification? 
           extent_management_clause? tablespace_retention_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:         ( ON PREBUILT TABLE ( (WITH | WITHOUT) REDUCED PRECISION)?
          | physical_properties?  (CACHE | NOCACHE)? parallel_clause? build_clause?
          )
          ( USING INDEX ( (physical_attributes_clause | TABLESPACE mv_tablespace=id_expression)+ )*
          | USING NO INDEX
          )?
          create_mv_refresh?
  