org.apache.beam.sdk.extensions.sql.impl.transform.agg

Class AggregationCombineFnAdapter<T>

java.lang.Object

org.apache.beam.sdk.extensions.sql.impl.transform.agg.AggregationCombineFnAdapter<T>

public class AggregationCombineFnAdapter<T>
extends java.lang.Object

Wrapper Combine.CombineFns for aggregation function calls.

Field Summary

Fields

Modifier and Type	Field and Description
static Row	EMPTY_ROW
static Schema	EMPTY_SCHEMA

Constructor Summary

Constructors

Constructor and Description
AggregationCombineFnAdapter()

Method Summary

Modifier and Type	Method and Description
static Combine.CombineFn<?,?,?>	createCombineFn(org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.rel.core.AggregateCall call, Schema.Field field, java.lang.String functionName) Creates either a UDAF or a built-in Combine.CombineFn.
static Combine.CombineFn<?,?,?>	createCombineFnAnalyticsFunctions(org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.rel.core.AggregateCall call, Schema.Field field, java.lang.String functionName) Creates either a UDAF or a built-in Combine.CombineFn for Analytic Functions.
static Combine.CombineFn<Row,?,Row>	createConstantCombineFn()

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_SCHEMA

public static final Schema EMPTY_SCHEMA

EMPTY_ROW

public static final Row EMPTY_ROW

Constructor Detail

AggregationCombineFnAdapter

public AggregationCombineFnAdapter()

Method Detail

createCombineFn

public static Combine.CombineFn<?,?,?> createCombineFn(org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.rel.core.AggregateCall call,
                                                       Schema.Field field,
                                                       java.lang.String functionName)

Creates either a UDAF or a built-in Combine.CombineFn.

createCombineFnAnalyticsFunctions

public static Combine.CombineFn<?,?,?> createCombineFnAnalyticsFunctions(org.apache.beam.vendor.calcite.v1_28_0.org.apache.calcite.rel.core.AggregateCall call,
                                                                         Schema.Field field,
                                                                         java.lang.String functionName)

Creates either a UDAF or a built-in Combine.CombineFn for Analytic Functions.

createConstantCombineFn

public static Combine.CombineFn<Row,?,Row> createConstantCombineFn()