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

Class ItemAtTypeStrategy

java.lang.Object

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

All Implemented Interfaces:

TypeStrategy

@Internal
public final class ItemAtTypeStrategy
extends Object
implements TypeStrategy

An output type strategy for BuiltInFunctionDefinitions.AT.

Returns either the element of an LogicalTypeFamily.COLLECTION type or the value of LogicalTypeRoot.MAP.

Constructor Summary

Constructors

Constructor and Description
ItemAtTypeStrategy()

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

ItemAtTypeStrategy

public ItemAtTypeStrategy()

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