anchor.diff:      ;
   
   references_clause
  -    : REFERENCES table_referenced=tableview_name paren_column_list
  +    : REFERENCES tableview_name paren_column_list
       ;
   
   on_delete_clause
  
positive.code: create_table
      : CREATE (GLOBAL TEMPORARY)? TABLE tableview_name 
          ( '(' (','? datatype_null_enable)+
          (',' CONSTRAINT create_table_constraint_name=constraint_name
            ( primary_key_clause
            | foreign_key_clause
            | unique_key_clause
  
negative.code:     ;
  
  add_constraint
      : ADD (CONSTRAINT constraint_name)?
       ( primary_key_clause
       | foreign_key_clause
       | unique_key_clause
  