org.apache.flink.table.types.logical

类 UserDefinedType

java.lang.Object

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

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

所有已实现的接口:

Serializable

直接已知子类:

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 anonymous, inline definition (for structured types only). Therefore, the serialized string representation is a unique ObjectIdentifier (if registered) or a representation does not exist (if unregistered).

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

另请参阅:

DistinctType, StructuredType, 序列化表格

方法概要

限定符和类型	方法和说明
String	asSerializableString() Returns a string that fully serializes this instance.
boolean	equals(Object o)
Optional<String>	getDescription()
Optional<ObjectIdentifier>	getObjectIdentifier()
int	hashCode()
boolean	isFinal()

从类继承的方法 org.apache.flink.table.types.logical.LogicalType

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

从类继承的方法 java.lang.Object

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

方法详细资料

getObjectIdentifier

public Optional<ObjectIdentifier> getObjectIdentifier()

isFinal

public boolean isFinal()

getDescription

public Optional<String> getDescription()

asSerializableString

public String asSerializableString()

从类复制的说明: 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.

指定者:

asSerializableString 在类中 LogicalType

返回:

detailed string for transmission or persistence

equals

public boolean equals(Object o)

覆盖:

equals 在类中 LogicalType

hashCode

public int hashCode()

覆盖:

hashCode 在类中 LogicalType