org.apache.flink.table.types

Class UnresolvedDataType

java.lang.Object

org.apache.flink.table.types.UnresolvedDataType

All Implemented Interfaces:

AbstractDataType<UnresolvedDataType>

@PublicEvolving
public final class UnresolvedDataType
extends Object
implements AbstractDataType<UnresolvedDataType>

Partially resolved data type that requires a lookup in a catalog or configuration before creating the corresponding LogicalType.

Users are able to influence the nullability and conversion class even if the actual LogicalType is not fully known yet. The information is stored and verified when resolving to DataType lazily.

Constructor Summary

Constructors

Constructor and Description
UnresolvedDataType(java.util.function.Supplier<String> description, java.util.function.Function<DataTypeFactory,DataType> resolutionFactory)

Method Summary

Modifier and Type	Method and Description
UnresolvedDataType	bridgedTo(Class<?> newConversionClass) Adds a hint that data should be represented using the given class when entering or leaving the table ecosystem.
UnresolvedDataType	notNull() Adds a hint that null values are not expected in the data for this type.
UnresolvedDataType	nullable() Adds a hint that null values are expected in the data for this type (default behavior).
DataType	toDataType(DataTypeFactory factory) Converts this instance to a resolved DataType possibly enriched with additional nullability and conversion class information.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

UnresolvedDataType

public UnresolvedDataType(java.util.function.Supplier<String> description,
                          java.util.function.Function<DataTypeFactory,DataType> resolutionFactory)

Method Detail

toDataType

public DataType toDataType(DataTypeFactory factory)

Converts this instance to a resolved DataType possibly enriched with additional nullability and conversion class information.

notNull

public UnresolvedDataType notNull()

Description copied from interface: AbstractDataType

Adds a hint that null values are not expected in the data for this type.

Specified by:

notNull in interface AbstractDataType<UnresolvedDataType>

Returns:

a new, reconfigured data type instance

nullable

public UnresolvedDataType nullable()

Description copied from interface: AbstractDataType

Adds a hint that null values are expected in the data for this type (default behavior).

This method exists for explicit declaration of the default behavior or for invalidation of a previous call to AbstractDataType.notNull().

Specified by:

nullable in interface AbstractDataType<UnresolvedDataType>

Returns:

a new, reconfigured data type instance

bridgedTo

public UnresolvedDataType bridgedTo(Class<?> newConversionClass)

Description copied from interface: AbstractDataType

Adds a hint that data should be represented using the given class when entering or leaving the table ecosystem.

A supported conversion class depends on the logical type and its nullability property.

Please see the implementation of LogicalType.supportsInputConversion(Class), LogicalType.supportsOutputConversion(Class), or the documentation for more information about supported conversions.

Specified by:

bridgedTo in interface AbstractDataType<UnresolvedDataType>

Returns:

a new, reconfigured data type instance

toString

public String toString()

Overrides:

toString in class Object