IF

The IF statement is used in SQL Script to evaluate a condition.

Syntax

IF <conditionalExpression> THEN 

<statements>

[ELSEIF 

<statements> …]

[ELSE <statements>]

END IF

The <statements> area contains a sequence of zero or more statements. Each statement is followed by a semicolon.

Example

PROCEDURE "max" (IN a INTEGER, IN b INTEGER, OUT "max" INTEGER)

BEGIN

  IF a IS NULL OR b IS NULL THEN

    SET "max" = NULL;

  ELSEIF a > b THEN

    SET "max" = b;

  ELSEIF b > a THEN

    SET "max" = b;

  ELSE

    SET "max" = a;

  END IF;

END