HiveAggDecimalPlusTypeStrategy (Flink : Table : Common 2.1.0 API)

java.lang.Object
- org.apache.flink.table.types.inference.strategies.HiveAggDecimalPlusTypeStrategy

All Implemented Interfaces:

TypeStrategy
```
@Internal
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 Description
  
  HiveAggDecimalPlusTypeStrategy()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method 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