org.apache.druid.sql.calcite.rel

Class Sorting

java.lang.Object

org.apache.druid.sql.calcite.rel.Sorting

public class Sorting
extends Object

Represents Druid's concept of sorting and limiting, including post-sort projections. The sorting and limiting piece may map onto multiple Druid concepts: LimitSpec (for groupBy), TopNMetricSpec and threshold (for topN), "descending" (for timeseries), or ScanQuery.Order (for scan). The post-sort projections will map onto either post-aggregations (for query types that aggregate) or virtual columns (for query types that don't). This corresponds to a Calcite Sort + optional Project.

Method Summary

Modifier and Type	Method and Description
static Sorting	create(List<OrderByColumnSpec> orderBys, OffsetLimit offsetLimit, Projection projection)
boolean	equals(Object o)
OffsetLimit	getOffsetLimit()
List<OrderByColumnSpec>	getOrderBys()
Projection	getProjection()
org.apache.druid.sql.calcite.rel.Sorting.SortKind	getTimeSortKind(String timeColumn)
int	hashCode()
LimitSpec	limitSpec() Returns a LimitSpec that encapsulates the orderBys, offset, and limit of this Sorting instance.
static Sorting	none()
String	toString()

Methods inherited from class java.lang.Object

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

Method Detail

create

public static Sorting create(List<OrderByColumnSpec> orderBys,
                             OffsetLimit offsetLimit,
                             @Nullable
                             Projection projection)

none

public static Sorting none()

getTimeSortKind

public org.apache.druid.sql.calcite.rel.Sorting.SortKind getTimeSortKind(String timeColumn)

getOrderBys

public List<OrderByColumnSpec> getOrderBys()

getProjection

@Nullable
public Projection getProjection()

getOffsetLimit

public OffsetLimit getOffsetLimit()

limitSpec

public LimitSpec limitSpec()

Returns a LimitSpec that encapsulates the orderBys, offset, and limit of this Sorting instance. Does not encapsulate the projection at all; you must still call getProjection() for that.

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object