Interface QuerySplitter (2.8.0)

Version 2.8.0

• 2.24.3 (latest)
• 2.24.1
• 2.23.0
• 2.22.0
• 2.21.3
• 2.20.2
• 2.19.2
• 2.18.5
• 2.17.6

public interface QuerySplitter

Provides the ability to split a query into multiple shards.

Methods

getSplits(Query query, PartitionId partition, int numSplits, Datastore datastore)

public abstract List<Query> getSplits(Query query, PartitionId partition, int numSplits, Datastore datastore)

Returns a list of sharded Querys for the given query.

This will create up to the desired number of splits, however it may return less splits if the desired number of splits is unavailable. This will happen if the number of split points provided by the underlying Datastore is less than the desired number, which will occur if the number of results for the query is too small.

Parameters

Name	Description
query	Query the query to split.
partition	PartitionId the partition the query is running in.
numSplits	int the desired number of splits.
datastore	Datastore the datastore to run on.

Returns

Type	Description
List<Query>

Exceptions

Type	Description
DatastoreException	if there was a datastore error while generating query splits.