org.elasticsearch.index.search.child

Class TopChildrenQuery

java.lang.Object

org.apache.lucene.search.Query

org.elasticsearch.index.search.child.TopChildrenQuery

All Implemented Interfaces:

Cloneable

Deprecated.

@Deprecated
public class TopChildrenQuery
extends org.apache.lucene.search.Query

A query that evaluates the top matching child documents (based on the score) in order to determine what parent documents to return. This query tries to find just enough child documents to return the the requested number of parent documents (or less if no other child document can be found).

This query executes several internal searches. In the first round it tries to find ((request offset + requested size) * factor) child documents. The resulting child documents are mapped into their parent documents including the aggragted child scores. If not enough parent documents could be resolved then a subsequent round is executed, requesting previous requested documents times incremental_factor. This logic repeats until enough parent documents are resolved or until no more child documents are available.

This query is most of the times faster than the ChildrenQuery. Usually enough parent documents can be returned in the first child document query round.

Constructor Summary

Constructors

Constructor and Description
TopChildrenQuery(IndexParentChildFieldData parentChildIndexFieldData, org.apache.lucene.search.Query childQuery, String childType, String parentType, ScoreType scoreType, int factor, int incrementalFactor, CacheRecycler cacheRecycler, FixedBitSetFilter nonNestedDocsFilter) Deprecated.

Method Summary

Modifier and Type	Method and Description
org.apache.lucene.search.Query	clone() Deprecated.
org.apache.lucene.search.Weight	createWeight(org.apache.lucene.search.IndexSearcher searcher) Deprecated.
boolean	equals(Object obj) Deprecated.
void	extractTerms(Set<org.apache.lucene.index.Term> terms) Deprecated.
int	hashCode() Deprecated.
org.apache.lucene.search.Query	rewrite(org.apache.lucene.index.IndexReader reader) Deprecated.
String	toString(String field) Deprecated.

Methods inherited from class org.apache.lucene.search.Query

getBoost, setBoost, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TopChildrenQuery

public TopChildrenQuery(IndexParentChildFieldData parentChildIndexFieldData,
                        org.apache.lucene.search.Query childQuery,
                        String childType,
                        String parentType,
                        ScoreType scoreType,
                        int factor,
                        int incrementalFactor,
                        CacheRecycler cacheRecycler,
                        FixedBitSetFilter nonNestedDocsFilter)

Deprecated.

Method Detail

rewrite

public org.apache.lucene.search.Query rewrite(org.apache.lucene.index.IndexReader reader)
                                       throws IOException

Deprecated.

Overrides:

rewrite in class org.apache.lucene.search.Query

Throws:

IOException

clone

public org.apache.lucene.search.Query clone()

Deprecated.

Overrides:

clone in class org.apache.lucene.search.Query

extractTerms

public void extractTerms(Set<org.apache.lucene.index.Term> terms)

Deprecated.

Overrides:

extractTerms in class org.apache.lucene.search.Query

createWeight

public org.apache.lucene.search.Weight createWeight(org.apache.lucene.search.IndexSearcher searcher)
                                             throws IOException

Deprecated.

Overrides:

createWeight in class org.apache.lucene.search.Query

Throws:

IOException

equals

public boolean equals(Object obj)

Deprecated.

Overrides:

equals in class org.apache.lucene.search.Query

hashCode

public int hashCode()

Deprecated.

Overrides:

hashCode in class org.apache.lucene.search.Query

toString

public String toString(String field)

Deprecated.

Specified by:

toString in class org.apache.lucene.search.Query