ES|QL LOG function

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base

Base of logarithm. If null, the function returns null. If not provided, this function returns the natural logarithm (base e) of a value.

number

Numeric expression. If null, the function returns null.

Returns the logarithm of a value to a base. The input can be any numeric value, the return value is always a double. Logs of zero, negative numbers, and base of one return null as well as a warning.

ROW base = 2.0, value = 8.0
| EVAL s = LOG(base, value)
		

ROW value = 100
| EVAL s = LOG(value);