org.apache.flink.cdc.common.types

类 MapType

java.lang.Object

org.apache.flink.cdc.common.types.DataType

org.apache.flink.cdc.common.types.MapType

所有已实现的接口:

Serializable

@PublicEvolving
public final class MapType
extends DataType

Data type of an associative array that maps keys (including NULL) to values (including NULL). A map cannot contain duplicate keys; each key can map to at most one value. There is no restriction of key types; it is the responsibility of the user to ensure uniqueness. The map type is an extension to the SQL standard.

另请参阅:

序列化表格

字段概要

字段

限定符和类型	字段和说明
static String	FORMAT

构造器概要

构造器

构造器和说明
MapType(boolean isNullable, DataType keyType, DataType valueType)
MapType(DataType keyType, DataType valueType)

方法概要

限定符和类型	方法和说明
<R> R	accept(DataTypeVisitor<R> visitor)
String	asSerializableString() Returns a string that fully serializes this instance.
String	asSummaryString() Returns a string that summarizes this type for printing to a console.
DataType	copy(boolean isNullable) Returns a deep copy of this type with possibly different nullability.
boolean	equals(Object o)
List<DataType>	getChildren()
DataType	getKeyType()
DataType	getValueType()
int	hashCode()

从类继承的方法 org.apache.flink.cdc.common.types.DataType

copy, getTypeRoot, is, is, isAnyOf, isAnyOf, isNullable, notNull, nullable, toString, withNullability

从类继承的方法 java.lang.Object

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

字段详细资料

FORMAT

public static final String FORMAT

另请参阅:

常量字段值

构造器详细资料

MapType

public MapType(boolean isNullable,
               DataType keyType,
               DataType valueType)

MapType

public MapType(DataType keyType,
               DataType valueType)

方法详细资料

getKeyType

public DataType getKeyType()

getValueType

public DataType getValueType()

copy

public DataType copy(boolean isNullable)

从类复制的说明: DataType

Returns a deep copy of this type with possibly different nullability.

指定者:

copy 在类中 DataType

参数:

isNullable - the intended nullability of the copied type

返回:

a deep copy

asSummaryString

public String asSummaryString()

从类复制的说明: DataType

Returns a string that summarizes this type for printing to a console. An implementation might shorten long names or skips very specific properties.

Use DataType.asSerializableString() for a type string that fully serializes this instance.

覆盖:

asSummaryString 在类中 DataType

返回:

summary string of this type for debugging purposes

asSerializableString

public String asSerializableString()

从类复制的说明: DataType

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

指定者:

asSerializableString 在类中 DataType

返回:

detailed string for transmission or persistence

getChildren

public List<DataType> getChildren()

指定者:

getChildren 在类中 DataType

accept

public <R> R accept(DataTypeVisitor<R> visitor)

指定者:

accept 在类中 DataType

equals

public boolean equals(Object o)

覆盖:

equals 在类中 DataType

hashCode

public int hashCode()

覆盖:

hashCode 在类中 DataType