log2 (Function)
This function returns the base 2 logarithm of p1.
Syntax
<DOUBLE> math:log2(<INT|LONG|FLOAT|DOUBLE> p1)
Query Parameters
| Name | Description | Default Value | Possible Data Types | Optional | Dynamic |
|---|---|---|---|---|---|
| p1 | The value of the parameter whose base 2 logarithm should be found. | INT LONG FLOAT DOUBLE | No | Yes |
Example 1
CREATE STREAM InValueStream (inValue double);
@info(name = 'calculateLogarithmBase2')
INSERT INTO OutMediationStream
SELECT math:log2(inValue) AS lnValue
FROM InValueStream;
The query calculates the base 2 logarithm of the given inValue from the InValueStream and directs the results to the output stream OutMediationStream. For example, log2(91) returns 6.507794640198696.