Package org.apache.druid.sql.calcite.rel

Class Grouping

java.lang.Object

org.apache.druid.sql.calcite.rel.Grouping

public class Grouping
extends Object

Represents Druid's concept of a "group by": dimensions, aggregations, post-aggregations, and 'having' filters. This is always something that can be handled by a groupBy query, and in some cases, it may be handleable by a timeseries or topN query type as well. This corresponds to a Calcite Aggregate + optional Filter + optional Project. It does not include sorting, limiting, or post-sorting projections: for this, see the Sorting class.

Method Summary

Modifier and Type	Method	Description
Grouping	applyProject(PlannerContext plannerContext, org.apache.calcite.rel.core.Project project)	Applies a post-grouping projection.
static Grouping	create(List<DimensionExpression> dimensions, Subtotals subtotals, List<Aggregation> aggregations, DimFilter havingFilter, RowSignature outputRowSignature)
boolean	equals(Object o)
List<Aggregation>	getAggregations()
List<AggregatorFactory>	getAggregatorFactories()
List<DimensionExpression>	getDimensions()
List<DimensionSpec>	getDimensionSpecs()
DimFilter	getHavingFilter()
RowSignature	getOutputRowSignature()
List<PostAggregator>	getPostAggregators()
Subtotals	getSubtotals()
boolean	hasGroupingDimensionsDropped()
int	hashCode()

Methods inherited from class java.lang.Object

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

Method Details

create

public static Grouping create(List<DimensionExpression> dimensions,
 Subtotals subtotals,
 List<Aggregation> aggregations,
 @Nullable
 DimFilter havingFilter,
 RowSignature outputRowSignature)

getDimensions

public List<DimensionExpression> getDimensions()

getSubtotals

public Subtotals getSubtotals()

getAggregations

public List<Aggregation> getAggregations()

getHavingFilter

@Nullable
public DimFilter getHavingFilter()

getDimensionSpecs

public List<DimensionSpec> getDimensionSpecs()

getAggregatorFactories

public List<AggregatorFactory> getAggregatorFactories()

getPostAggregators

public List<PostAggregator> getPostAggregators()

getOutputRowSignature

public RowSignature getOutputRowSignature()

hasGroupingDimensionsDropped

public boolean hasGroupingDimensionsDropped()

applyProject

public Grouping applyProject(PlannerContext plannerContext,
 org.apache.calcite.rel.core.Project project)

Applies a post-grouping projection.

See Also:

• which uses this

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object