The LOG10 function returns the common logarithm (base 10) of a number.

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)