org.apache.hadoop.hive.ql.reexec

Interface IReExecutionPlugin

All Known Implementing Classes:

ReCompileWithoutCBOPlugin, ReExecuteLostAMQueryPlugin, ReExecuteOnWriteConflictPlugin, ReExecutionDagSubmitPlugin, ReExecutionOverlayPlugin, ReOptimizePlugin

@InterfaceAudience.Private
 @InterfaceStability.Unstable
public interface IReExecutionPlugin

Defines an interface for re-execution logics. FIXME: rethink methods.

Method Summary

Modifier and Type	Method and Description
default void	afterCompile(boolean successful) Called after the compilation - delivers the result of the new compilation.
default void	afterExecute(PlanMapper planMapper, boolean successful) Called after the driver executed the query - delivers the status and the plan data.
default void	beforeCompile(int compilationNum) Called before the compilation happen.
default void	beforeExecute(int executionIndex, boolean explainReOptimization) Called before executing the query.
void	initialize(Driver driver) Called when the Driver is being initialized The plugin may add hooks/etc to tap into the system.
default void	prepareToReCompile() The plugin should prepare for the recompilation of the query
default void	prepareToReExecute() The plugin should prepare for the re-compilation of the query.
default boolean	shouldReCompile(int compilationNum) The query has failed.
default boolean	shouldReExecute(int executionNum) The query have failed, does this plugin advises to re-execute it again?
default boolean	shouldReExecuteAfterCompile(int executionNum, PlanMapper oldPlanMapper, PlanMapper newPlanMapper) The query has failed; and have been recompiled - does this plugin advises to re-execute it again?

Method Detail

initialize

void initialize(Driver driver)

Called when the Driver is being initialized The plugin may add hooks/etc to tap into the system.

beforeExecute

default void beforeExecute(int executionIndex,
                           boolean explainReOptimization)

Called before executing the query.

shouldReExecute

default boolean shouldReExecute(int executionNum)

The query have failed, does this plugin advises to re-execute it again?

prepareToReExecute

default void prepareToReExecute()

The plugin should prepare for the re-compilation of the query.

shouldReExecuteAfterCompile

default boolean shouldReExecuteAfterCompile(int executionNum,
                                            PlanMapper oldPlanMapper,
                                            PlanMapper newPlanMapper)

The query has failed; and have been recompiled - does this plugin advises to re-execute it again?

afterExecute

default void afterExecute(PlanMapper planMapper,
                          boolean successful)

Called after the driver executed the query - delivers the status and the plan data.

Parameters:

planMapper -

successful -

beforeCompile

default void beforeCompile(int compilationNum)

Called before the compilation happen.

Parameters:

compilationNum - Number of the previous compilations

shouldReCompile

default boolean shouldReCompile(int compilationNum)

The query has failed. Should we try recompilation?

Parameters:

compilationNum - Number of the previous compilations

Returns:

prepareToReCompile

default void prepareToReCompile()

The plugin should prepare for the recompilation of the query

afterCompile

default void afterCompile(boolean successful)

Called after the compilation - delivers the result of the new compilation.

Parameters:

successful -