PRECISION returns the value of x, with a precision specified
by p and q. The base, mode, and scale of the returned
value are the same as that of x.
>>-PRECISION(x,p-+----+-)-------------------------------------->< '-,q-'
Abbreviation: PREC
- x
- Expression.
- p
- Restricted expression. p specifies the number of digits that the value of the expression x is to have after conversion.
- q
- Restricted expression. It specifies the scaling factor of the result. For a fixed-point result, if q is omitted, a scaling factor of zero is assumed. For a floating-point result, q must be omitted.