org.apache.gravitino.rel.expressions.distributions

Interface Distribution

All Superinterfaces:

Expression

All Known Implementing Classes:

DistributionDTO, Distributions.DistributionImpl

@Evolving
public interface Distribution
extends Expression

An interface that defines how data is distributed across partitions.

Field Summary

Fields inherited from interface org.apache.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
default Expression[]	children()
default boolean	equals(Distribution distribution) Indicates whether some other object is "equal to" this one.
Expression[]	expressions()
int	number()
Strategy	strategy()

Methods inherited from interface org.apache.gravitino.rel.expressions.Expression

references

Method Detail

strategy

Strategy strategy()

Returns:

the distribution strategy name.

number

int number()

Returns:

The number of buckets/distribution. For example, if the distribution strategy is HASH and the number is 10, then the data is distributed across 10 buckets.

expressions

Expression[] expressions()

Returns:

The expressions passed to the distribution function.

children

default Expression[] children()

Specified by:

children in interface Expression

Returns:

An array of the children of this node. Children should not change.

equals

default boolean equals(Distribution distribution)

Indicates whether some other object is "equal to" this one.

Parameters:

distribution - The reference distribution object with which to compare.

Returns:

returns true if this object is the same as the obj argument; false otherwise.