org.apache.flink.table.types.inference

Class TypeInference

java.lang.Object

org.apache.flink.table.types.inference.TypeInference

@PublicEvolving
public final class TypeInference
extends Object

Provides logic for the type inference of function calls. It includes:

• explicit input specification for (possibly named and/or typed) arguments
• inference of missing or incomplete input types
• validation of input types
• inference of an intermediate accumulation type
• inference of the final output type

See TypeInferenceUtil for more information about the type inference process.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	TypeInference.Builder Builder for configuring and creating instances of TypeInference.

Method Summary

Modifier and Type	Method and Description
Optional<TypeStrategy>	getAccumulatorTypeStrategy()
InputTypeStrategy	getInputTypeStrategy()
Optional<List<String>>	getNamedArguments()
Optional<List<Boolean>>	getOptionalArguments()
TypeStrategy	getOutputTypeStrategy()
Optional<List<DataType>>	getTypedArguments()
static TypeInference.Builder	newBuilder() Builder for configuring and creating instances of TypeInference.

Methods inherited from class java.lang.Object

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

Method Detail

newBuilder

public static TypeInference.Builder newBuilder()

Builder for configuring and creating instances of TypeInference.

getNamedArguments

public Optional<List<String>> getNamedArguments()

getTypedArguments

public Optional<List<DataType>> getTypedArguments()

getOptionalArguments

public Optional<List<Boolean>> getOptionalArguments()

getInputTypeStrategy

public InputTypeStrategy getInputTypeStrategy()

getAccumulatorTypeStrategy

public Optional<TypeStrategy> getAccumulatorTypeStrategy()

getOutputTypeStrategy

public TypeStrategy getOutputTypeStrategy()