org.apache.calcite.runtime

Class RandomFunction

java.lang.Object

org.apache.calcite.runtime.RandomFunction

public class RandomFunction
extends Object

Function object for RAND and RAND_INTEGER, with and without seed.

Constructor Summary

Constructors

Constructor and Description
RandomFunction() Creates a RandomFunction.

Method Summary

Modifier and Type	Method and Description
double	rand() Implements the RAND() SQL function.
int	randInteger(int bound) Implements the RAND_INTEGER(bound) SQL function.
int	randIntegerSeed(int seed, int bound) Implements the RAND_INTEGER(seed, bound) SQL function.
double	randSeed(int seed) Implements the RAND(seed) SQL function.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

RandomFunction

public RandomFunction()

Creates a RandomFunction.

Marked deterministic so that the code generator instantiates one once per query, not once per row.

Method Detail

rand

public double rand()

Implements the RAND() SQL function.

randSeed

public double randSeed(int seed)

Implements the RAND(seed) SQL function.

randInteger

public int randInteger(int bound)

Implements the RAND_INTEGER(bound) SQL function.

randIntegerSeed

public int randIntegerSeed(int seed,
                           int bound)

Implements the RAND_INTEGER(seed, bound) SQL function.