Package org.apache.druid.query

Class BySegmentQueryRunner<T>

java.lang.Object

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

All Implemented Interfaces:

QueryRunner<T>

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

Query runner that wraps a base single-segment query runner, and wraps its results in a BySegmentResultValueClass object if the "bySegment" query context parameter is set. Otherwise, it delegates to the base runner without any behavior modification. Note that despite the type parameter "T", this runner may not actually return sequences with type T. They may really be of type Result<BySegmentResultValue<T>>, if "bySegment" is set. Downstream consumers of the returned sequence must be aware of this, and can use QueryContext.isBySegment() to know what to expect.

Constructor Summary

Constructors

Constructor	Description
BySegmentQueryRunner(SegmentId segmentId, org.joda.time.DateTime timestamp, QueryRunner<T> base)

Method Summary

Modifier and Type	Method	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

BySegmentQueryRunner

public BySegmentQueryRunner(SegmentId segmentId,
                            org.joda.time.DateTime timestamp,
                            QueryRunner<T> base)

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>