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

类 HiveAggDecimalPlusTypeStrategy

java.lang.Object

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

所有已实现的接口:

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.

构造器概要

构造器

构造器和说明
HiveAggDecimalPlusTypeStrategy()

方法概要

限定符和类型	方法和说明
Optional<DataType>	inferType(CallContext callContext) Infers a type from the given function call.

从类继承的方法 java.lang.Object

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

构造器详细资料

HiveAggDecimalPlusTypeStrategy

public HiveAggDecimalPlusTypeStrategy()

方法详细资料

inferType

public Optional<DataType> inferType(CallContext callContext)

从接口复制的说明: TypeStrategy

Infers a type from the given function call.

指定者:

inferType 在接口中 TypeStrategy