org.apache.drill.exec.physical.impl.join

Interface HashJoinStateCalculator<T extends HashJoinStateCalculator<?>>

All Known Subinterfaces:

HashJoinMemoryCalculator, HashJoinMemoryCalculator.BuildSidePartitioning, HashJoinMemoryCalculator.PostBuildCalculations

All Known Implementing Classes:

HashJoinMechanicalMemoryCalculator, HashJoinMechanicalMemoryCalculator.MechanicalBuildSidePartitioning, HashJoinMechanicalMemoryCalculator.MechanicalPostBuildCalculations, HashJoinMemoryCalculatorImpl, HashJoinMemoryCalculatorImpl.BuildSidePartitioningImpl, HashJoinMemoryCalculatorImpl.NoopBuildSidePartitioningImpl, HashJoinMemoryCalculatorImpl.NoopPostBuildCalculationsImpl, HashJoinMemoryCalculatorImpl.PostBuildCalculationsImpl

public interface HashJoinStateCalculator<T extends HashJoinStateCalculator<?>>

A HashJoinStateCalculator is a piece of code that compute the memory requirements for one of the states in the HashJoinState enum.

Method Summary

Modifier and Type	Method and Description
HashJoinState	getState() The current HashJoinState corresponding to this calculator.
T	next() Signifies that the current state is complete and returns the next HashJoinStateCalculator.

Method Detail

next

@Nullable
T next()

Signifies that the current state is complete and returns the next HashJoinStateCalculator. Returns null in the case where there is no next state.

Returns:

The next HashJoinStateCalculator or null if this was the last state.

getState

HashJoinState getState()

The current HashJoinState corresponding to this calculator.

Returns: