The
LOG10 function returns the common logarithm (base 10) of a number.
>>-LOG10--(--expression--)-------------------------------------><
The schema is SYSIBM. (The SYSFUN version of the LOG10
function continues to be available.)
- expression
- An expression that returns a value of any built-in numeric data
type. If the value is of decimal floating-point data type, the operation
is performed in decimal floating-point; otherwise, the value is converted
to double-precision floating-point for processing by the function.
The value of the argument must be greater than zero (SQLSTATE 22003).
If the argument is DECFLOAT(n), the result is DECFLOAT(n); otherwise, the result
is a double-precision floating-point number. The result can be null;
if the argument is null, the result is the null value.
Notes
- Results involving DECFLOAT special values: For decimal
floating-point values, the special values are treated as follows:
- LOG10(NaN) returns NaN.
- LOG10(-NaN) returns -NaN.
- LOG10(Infinity) returns Infinity.
- LOG10(-Infinity) returns NaN and a warning.
- LOG10(sNaN) returns NaN and a warning.
- LOG10(-sNaN) returns -NaN and a warning.
- LOG10(DECFLOAT('0') returns -Infinity.
Example
Assume that L is a DECIMAL(4,2) host variable with a value of 31.62.
VALUES LOG10(:L)
Returns the DOUBLE value +1.49996186559619E+000.
DB2 Version 10.1 for Linux, UNIX, and Windows