rand (Function)
This returns a stream of pseudo-random numbers when a sequence of calls are sent to the rand(). Optionally, it is possible to define a seed, i.e., rand(seed) using which the pseudo-random numbers are generated. These functions internally use the java.util.Random class.
Syntax
<DOUBLE> math:rand()
<DOUBLE> math:rand(<INT|LONG> seed)
Query Parameters
| Name | Description | Default Value | Possible Data Types | Optional | Dynamic |
|---|---|---|---|---|---|
| seed | An optional seed value that will be used to generate the random number sequence. | defaultSeed | INT LONG | Yes | Yes |
Example 1
CREATE STREAM InValueStream (symbol string, price long, volume long);
insert into OutMediationStream
select math:oct(inValue) as octValue
from InValueStream select symbol, math:rand() as randNumber;
In the example given above, a random double value between 0 and 1 will be generated using math:rand().