Package org.opensearch.join.aggregations

Class ParentJoinAggregator

java.lang.Object

org.opensearch.search.aggregations.BucketCollector

org.opensearch.search.aggregations.Aggregator

org.opensearch.search.aggregations.AggregatorBase

org.opensearch.search.aggregations.bucket.BucketsAggregator

org.opensearch.join.aggregations.ParentJoinAggregator

All Implemented Interfaces:

Closeable, AutoCloseable, org.apache.lucene.search.Collector, Releasable, SingleBucketAggregator

Direct Known Subclasses:

ChildrenToParentAggregator, ParentToChildrenAggregator

public abstract class ParentJoinAggregator
extends BucketsAggregator
implements SingleBucketAggregator

An aggregator that joins documents based on global ordinals. Global ordinals that match the main query and the inFilter query are replayed with documents matching the outFilter query.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static interface	ParentJoinAggregator.CollectionStrategy	Strategy for collecting the global ordinals of the join field in for all docs that match the ParentJoinAggregator#inFilter and then checking if which of the docs in the ParentJoinAggregator#outFilter also have the ordinal.
protected class	ParentJoinAggregator.DenseCollectionStrategy	Uses a dense, bit per ordinal representation of the join field in the docs that match ParentJoinAggregator#inFilter.
protected class	ParentJoinAggregator.SparseCollectionStrategy	Uses a hashed representation of whether of the join field in the docs that match ParentJoinAggregator#inFilter.

Nested classes/interfaces inherited from class org.opensearch.search.aggregations.bucket.BucketsAggregator

BucketsAggregator.BucketBuilderForFixedCount<B extends Object>, BucketsAggregator.BucketBuilderForVariable<B extends Object>, BucketsAggregator.ResultBuilderForVariable<B extends Object>, BucketsAggregator.SingleBucketResultBuilder

Nested classes/interfaces inherited from class org.opensearch.search.aggregations.Aggregator

Aggregator.BucketComparator, Aggregator.Parser, Aggregator.SubAggCollectionMode

Field Summary

Fields inherited from class org.opensearch.search.aggregations.bucket.BucketsAggregator

docCountProvider

Fields inherited from class org.opensearch.search.aggregations.AggregatorBase

collectableSubAggregators, context, DEFAULT_WEIGHT, name, parent, subAggregators

Fields inherited from class org.opensearch.search.aggregations.BucketCollector

NO_OP_COLLECTOR

Constructor Summary

Constructors

Constructor	Description
ParentJoinAggregator(String name, AggregatorFactories factories, SearchContext context, Aggregator parent, org.apache.lucene.search.Query inFilter, org.apache.lucene.search.Query outFilter, ValuesSource.Bytes.WithOrdinals valuesSource, long maxOrd, CardinalityUpperBound cardinality, Map<String,Object> metadata)

Method Summary

Modifier and Type	Method	Description
protected void	beforeBuildingBuckets(long[] ordsToCollect)
protected void	doClose()
final LeafBucketCollector	getLeafCollector(LeafReaderContext ctx, LeafBucketCollector sub)
void	postCollection()

Methods inherited from class org.opensearch.search.aggregations.bucket.BucketsAggregator

bucketComparator, bucketDocCount, buildAggregationsForFixedBucketCount, buildAggregationsForSingleBucket, buildAggregationsForVariableBuckets, buildSubAggsForAllBuckets, buildSubAggsForBuckets, buildSubAggsForBuckets, close, collectBucket, collectExistingBucket, descendsFromGlobalAggregator, getDocCounts, grow, incrementBucketDocCount, maxBucketOrd, mergeBuckets, mergeBuckets, preGetSubLeafCollectors, resolveSortPath

Methods inherited from class org.opensearch.search.aggregations.AggregatorBase

addRequestCircuitBreakerBytes, buildEmptySubAggregations, context, doPostCollection, doPreCollection, getLeafCollector, metadata, name, parent, pointReaderIfAvailable, preCollection, scoreMode, subAggregator, subAggregators, toString

Methods inherited from class org.opensearch.search.aggregations.Aggregator

buildAggregations, buildEmptyAggregation, buildTopLevel, collectDebugInfo, resolveSortPathOnValidAgg

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.lucene.search.Collector

setWeight

Constructor Details

ParentJoinAggregator

public ParentJoinAggregator(String name,
 AggregatorFactories factories,
 SearchContext context,
 Aggregator parent,
 org.apache.lucene.search.Query inFilter,
 org.apache.lucene.search.Query outFilter,
 ValuesSource.Bytes.WithOrdinals valuesSource,
 long maxOrd,
 CardinalityUpperBound cardinality,
 Map<String,Object> metadata)
                     throws IOException

Throws:

IOException

Method Details

getLeafCollector

public final LeafBucketCollector getLeafCollector(LeafReaderContext ctx,
 LeafBucketCollector sub)
                                           throws IOException

Specified by:

getLeafCollector in class AggregatorBase

Throws:

IOException

postCollection

public void postCollection()
                    throws IOException

Overrides:

postCollection in class AggregatorBase

Throws:

IOException

beforeBuildingBuckets

protected void beforeBuildingBuckets(long[] ordsToCollect)
                              throws IOException

Overrides:

beforeBuildingBuckets in class BucketsAggregator

Throws:

IOException

doClose

protected void doClose()

Overrides:

doClose in class AggregatorBase