org.apache.spark.sql.connector.read

Interface SupportsReportOrdering

All Superinterfaces:

Scan

@Evolving
public interface SupportsReportOrdering
extends Scan

A mix in interface for Scan. Data sources can implement this interface to report the order of data in each partition to Spark. Global order is part of the partitioning, see SupportsReportPartitioning.

Spark uses ordering information to exploit existing order to avoid sorting required by subsequent operations.

Since:

3.4.0

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.spark.sql.connector.read.Scan

Scan.ColumnarSupportMode

Method Summary

Modifier and Type	Method and Description
SortOrder[]	outputOrdering() Returns the order in each partition of this data source scan.

Methods inherited from interface org.apache.spark.sql.connector.read.Scan

columnarSupportMode, description, readSchema, reportDriverMetrics, supportedCustomMetrics, toBatch, toContinuousStream, toMicroBatchStream

Method Detail

outputOrdering

SortOrder[] outputOrdering()

Returns the order in each partition of this data source scan.