org.apache.druid.query

Class FinalizeResultsQueryRunner<T>

java.lang.Object

org.apache.druid.query.FinalizeResultsQueryRunner<T>

All Implemented Interfaces:

QueryRunner<T>

public class FinalizeResultsQueryRunner<T>
extends Object
implements QueryRunner<T>

Query runner that applies QueryToolChest.makePostComputeManipulatorFn(Query, MetricManipulationFn) to the result stream. It is expected to be the last runner in the pipeline, after results are fully merged. Note that despite the type parameter "T", this runner may not actually return sequences with type T. This most commonly happens when an upstream BySegmentQueryRunner changes the result stream to type Result<BySegmentResultValue<T>>, in which case this class will retain the structure, but call the finalizer function on each result in the by-segment list (which may change their type from T to something else).

Constructor Summary

Constructors

Constructor and Description
FinalizeResultsQueryRunner(QueryRunner<T> baseRunner, QueryToolChest<T,Query<T>> toolChest)

Method Summary

Modifier and Type	Method and Description
Sequence<T>	run(QueryPlus<T> queryPlus, ResponseContext responseContext) Runs the given query and returns results in a time-ordered sequence.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.query.QueryRunner

run

Constructor Detail

FinalizeResultsQueryRunner

public FinalizeResultsQueryRunner(QueryRunner<T> baseRunner,
                                  QueryToolChest<T,Query<T>> toolChest)

Method Detail

run

public Sequence<T> run(QueryPlus<T> queryPlus,
                       ResponseContext responseContext)

Description copied from interface: QueryRunner

Runs the given query and returns results in a time-ordered sequence.

Specified by:

run in interface QueryRunner<T>