org.apache.flink.table.types.inference.strategies

Class HiveAggDecimalPlusTypeStrategy

java.lang.Object

org.apache.flink.table.types.inference.strategies.HiveAggDecimalPlusTypeStrategy

All Implemented Interfaces:

TypeStrategy

public class HiveAggDecimalPlusTypeStrategy
extends Object
implements TypeStrategy

Type strategy that returns the result type of a decimal addition, used internally for implementing native SUM/AVG aggregations on a Decimal type. Here is used to prevent the normal DecimalPlusTypeStrategy from overriding the special calculation for precision and scale needed by the aggregate function. LogicalTypeMerging.findAdditionDecimalType(int, int, int, int) will adjust the precision according to the two input arguments, but for hive we just keep the precision as input type because of the input type precision is the same.

Constructor Summary

Constructors

Constructor and Description
HiveAggDecimalPlusTypeStrategy()

Method Summary

Modifier and Type	Method and Description
Optional<DataType>	inferType(CallContext callContext) Infers a type from the given function call.

Methods inherited from class java.lang.Object

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

Constructor Detail

HiveAggDecimalPlusTypeStrategy

public HiveAggDecimalPlusTypeStrategy()

Method Detail

inferType

public Optional<DataType> inferType(CallContext callContext)

Description copied from interface: TypeStrategy

Infers a type from the given function call.

Specified by:

inferType in interface TypeStrategy