com.google.cloud.firestore

Class CollectionGroup

java.lang.Object

com.google.cloud.firestore.Query

com.google.cloud.firestore.CollectionGroup

public class CollectionGroup
extends Query

A Collection Group query matches all documents that are contained in a collection or subcollection with a specific collection ID.

Nested Class Summary

Nested classes/interfaces inherited from class com.google.cloud.firestore.Query

Query.Direction

Method Summary

Modifier and Type	Method and Description
void	getPartitions(long desiredPartitionCount, com.google.api.gax.rpc.ApiStreamObserver<QueryPartition> observer) Partitions a query by returning partition cursors that can be used to run the query in parallel.

Methods inherited from class com.google.cloud.firestore.Query

addSnapshotListener, addSnapshotListener, endAt, endAt, endBefore, endBefore, equals, fromProto, get, getFirestore, hashCode, limit, limitToLast, offset, orderBy, orderBy, orderBy, orderBy, select, select, startAfter, startAfter, startAt, startAt, stream, toProto, whereArrayContains, whereArrayContains, whereArrayContainsAny, whereArrayContainsAny, whereEqualTo, whereEqualTo, whereGreaterThan, whereGreaterThan, whereGreaterThanOrEqualTo, whereGreaterThanOrEqualTo, whereIn, whereIn, whereLessThan, whereLessThan, whereLessThanOrEqualTo, whereLessThanOrEqualTo, whereNotEqualTo, whereNotEqualTo, whereNotIn, whereNotIn

Methods inherited from class java.lang.Object

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

Method Detail

getPartitions

public void getPartitions(long desiredPartitionCount,
                          com.google.api.gax.rpc.ApiStreamObserver<QueryPartition> observer)

Partitions a query by returning partition cursors that can be used to run the query in parallel. The returned partition cursors are split points that can be used as starting/end points for the query results.

Parameters:

desiredPartitionCount - The desired maximum number of partition points. The number must be strictly positive. The actual number of partitions returned may be fewer.

observer - a stream observer that receives the result of the Partition request.