anchor.diff:  
   close_statement -> CLOSE cursor                                                                 : {'close', '$2'}.
   
  -commit_statement -> COMMIT WORK                                                                 : 'commit_work'.
  +commit_statement -> COMMIT WORK                                                                 : 'commit work'.
   
   delete_statement_positioned -> DELETE FROM table WHERE CURRENT OF cursor                        : {'delete', '$3',{'where_current_of', '$7'}}.
   
  
positive.code: privilege_def -> GRANT privileges ON table TO grantee_commalist opt_with_grant_option           : {'grant', '$2', {'on', '$4'}, {'to', '$6'}, '$7'}.
  
  opt_with_grant_option -> '$empty'                                                               : [].
  opt_with_grant_option -> WITH GRANT OPTION                                                      : 'with_grant_opt'.
  
  privileges -> ALL PRIVILEGES                                                                    : 'all_privileges'.
  privileges -> ALL                                                                               : 'all'.
  privileges -> operation_commalist                                                               : '$1'.
  
  
negative.code: 
  open_statement -> OPEN cursor                                                                   : {'open', '$2'}.
  
  rollback_statement -> ROLLBACK WORK                                                             : 'rollback work'.
  
  select_statement -> SELECT opt_hint opt_all_distinct selection INTO target_commalist table_exp
                   : case '$2' of
  