@Beta public interface CqnGroupByTransformation extends CqnTransformation

Transformation that groups the result set according to specified dimensions and applies given transformations to each group.

The result set is the grouped input set after applying the transformations.

Two scenarios are common:

1. the list of transformations is empty -> the output set contains the distinct values of the dimensions

2. a single aggregate transformation is specified -> the output set contains the aggregated values per dimension

Nested Class Summary

Nested classes/interfaces inherited from interface com.sap.cds.ql.cqn.transformation.CqnTransformation
CqnTransformation.Kind
Field Summary

Fields inherited from interface com.sap.cds.ql.cqn.transformation.CqnTransformation
IDENTITY
Method Summary

Modifier and Type

Method

Description

default void

accept(CqnTransformationVisitor visitor)

List<CqnElementRef>

dimensions()

Returns the dimensions by which the input set is grouped.

default CqnTransformation.Kind

kind()

Returns the kind of this transformation

default List<CqnTransformation>

transformations()

Returns the pipeline of transformations, which is applied to the grouped input set.

Methods inherited from interface com.sap.cds.ql.cqn.transformation.CqnTransformation
rowType, toJson

Interface CqnGroupByTransformation

Nested Class Summary