Сделано в 6.0.16: [Optimization] Statement logic of IF function
(1) IF function optimization writing method: IF (conditional expression 1, result 1, conditional expression 2, result 2,..., other results)
(2) If conditional expression 1 is met, result 1 is returned. If conditional expression 2 is met and conditional expression 1 is not met, result 2 is returned. If there is no satisfied conditional expression, other results are returned.
