Compares the
left_operand to the
right_operand and returns the result as an integer.
The optional scale
parameter is used to set the number of digits after the
decimal place which will be used in the comparison. The
return value is 0 if the two operands are equal. If the left_operand is larger than the
right_operand the return
value is +1 and if the
left_operand is less than the
right_operand the return value is -1.