The MULTIPLY_ALT scalar function returns the product of the two arguments as a decimal value. It is provided as an alternative to the multiplication operator, especially when the sum of the precisions of the arguments exceeds 63.
Example:
Multiply two values where the data type of the first argument is DECIMAL(26,3) and the data type of the second argument is DECIMAL(9,8). The data type of the result is DECIMAL(31,7).
SELECT MULTIPLY_ALT(98765432109876543210987.654,5.43210987) FROM SYSIBM.SYSDUMMY1
Returns the value 536504678578875294857887.5277415.