org.apache.flink.table.types.logical

Class UserDefinedType

java.lang.Object

org.apache.flink.table.types.logical.LogicalType

org.apache.flink.table.types.logical.UserDefinedType

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

DistinctType, StructuredType

@PublicEvolving
public abstract class UserDefinedType
extends LogicalType

Logical type of a user-defined representation for one or more built-in types. A user-defined type is either a distinct type or a structured type.

A UserDefinedType instance is the result of a catalog lookup or an explicit definition. Therefore, the serialized string representation is a unique ObjectIdentifier.

NOTE: Compared to the SQL standard, this class and subclasses are incomplete. We might add new features such as method declarations in the future.

See Also:

DistinctType, StructuredType, Serialized Form

Method Summary

Modifier and Type	Method and Description
String	asSerializableString() Returns a string that fully serializes this instance.
boolean	equals(Object o)
Optional<String>	getDescription()
ObjectIdentifier	getObjectIdentifier()
int	hashCode()
boolean	isFinal()

Methods inherited from class org.apache.flink.table.types.logical.LogicalType

accept, asSummaryString, conversionSet, copy, copy, getChildren, getDefaultConversion, getTypeRoot, isNullable, supportsInputConversion, supportsOutputConversion, toString, withNullability

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

getObjectIdentifier

public ObjectIdentifier getObjectIdentifier()

isFinal

public boolean isFinal()

getDescription

public Optional<String> getDescription()

asSerializableString

public String asSerializableString()

Description copied from class: LogicalType

Returns a string that fully serializes this instance. The serialized string can be used for transmitting or persisting a type.

See LogicalTypeParser for the reverse operation.

Specified by:

asSerializableString in class LogicalType

Returns:

detailed string for transmission or persistence

equals

public boolean equals(Object o)

Overrides:

equals in class LogicalType

hashCode

public int hashCode()

Overrides:

hashCode in class LogicalType