anchor.diff:      | SET ANSI_NULLS on_off
       | SET QUOTED_IDENTIFIER on_off
       | SET ANSI_PADDING on_off
  -    ;
  +    ;*/
   
   constant_LOCAL_ID
       : constant
  
positive.code:     | ROLLBACK WORK? ';'?
      // https://msdn.microsoft.com/en-us/library/ms188378.aspx
      | SAVE (TRAN | TRANSACTION) (id | LOCAL_ID)? ';'?
      ;
  
  // https://msdn.microsoft.com/en-us/library/ms188037.aspx
  go_statement
      : GO (count=DECIMAL)?
      ;
  
  // https://msdn.microsoft.com/en-us/library/ms188366.aspx
  use_statement
  
negative.code: /* Will visit later
  database_mirroring_option:
       ALTER DATABASE Database Mirroring
      ; */
  
  
  /*date_correlation_optimization_option:
      DATE_CORRELATION_OPTIMIZATION on_off
      ;
  
  