Package 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 Object

Wrapper Combine.CombineFns for aggregation function calls.

Field Summary

Fields

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

Constructor Summary

Constructors

Constructor	Description
AggregationCombineFnAdapter()

Method Summary

Modifier and Type	Method	Description
static Combine.CombineFn<?,?,?>	createCombineFn(org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.core.AggregateCall call, Schema.Field field, String functionName)	Creates either a UDAF or a built-in Combine.CombineFn.
static Combine.CombineFn<?,?,?>	createCombineFnAnalyticsFunctions(org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.core.AggregateCall call, Schema.Field field, 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 Details

EMPTY_SCHEMA

public static final Schema EMPTY_SCHEMA

EMPTY_ROW

public static final Row EMPTY_ROW

Constructor Details

AggregationCombineFnAdapter

public AggregationCombineFnAdapter()

Method Details

createCombineFn

public static Combine.CombineFn<?,?,?> createCombineFn(org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.core.AggregateCall call,
 Schema.Field field,
 String functionName)

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

createCombineFnAnalyticsFunctions

public static Combine.CombineFn<?,?,?> createCombineFnAnalyticsFunctions(org.apache.beam.vendor.calcite.v1_40_0.org.apache.calcite.rel.core.AggregateCall call,
 Schema.Field field,
 String functionName)

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

createConstantCombineFn

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