Gbase 8s stored procedure flow control

IF、ELSE Conditional statements

IF、ELSE The syntax format of conditional statements is ：

IF < expression > THEN

        { Sentence block }

ELSEIF < expression > THEN

        { Sentence block }

ELSE

        { Sentence block }

END IF;

CASE structure

         Some complex programs may have to change the value of a variable Multiple judgment , If you use IF、ELSE Structure makes the program , It's complicated , Increased code volume . You can use CASE structure To simplify the code .

CASE The syntax format of the function is as follows ：

CASE < expression >

        WHEN < It's worth > THEN

                { Sentence block }

        WHEN < It's worth > THEN

                { Sentence block }

        …

END CASE;

Loop structure

         When the program needs Execute the same code repeatedly when , You can use SPL The loop structure provided implements such complex functions .WHILE Loop structure as follows ：

WHILE < expression >

        { Sentence block }

END WHILE;