org.apache.paimon.types

枚举 RowKind

java.lang.Object

java.lang.Enum<RowKind>

org.apache.paimon.types.RowKind

所有已实现的接口:

Serializable, Comparable<RowKind>

@Public
public enum RowKind
extends Enum<RowKind>

Lists all kinds of changes that a row can describe in a changelog.

从以下版本开始:

0.4.0

枚举常量概要

枚举常量

枚举常量和说明
DELETE Deletion operation.
INSERT Insertion operation.
UPDATE_AFTER Update operation with new content of the updated row.
UPDATE_BEFORE Update operation with the previous content of the updated row.

方法概要

限定符和类型	方法和说明
static RowKind	fromByteValue(byte value) Creates a RowKind from the given byte value.
static RowKind	fromShortString(String value) Creates a RowKind from the given short string.
boolean	isAdd() Is INSERT or UPDATE_AFTER.
boolean	isRetract() Is UPDATE_BEFORE or DELETE.
String	shortString() Returns a short string representation of this RowKind.
byte	toByteValue() Returns the byte value representation of this RowKind.
static RowKind	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static RowKind[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

枚举常量详细资料

INSERT

public static final RowKind INSERT

Insertion operation.

UPDATE_BEFORE

public static final RowKind UPDATE_BEFORE

Update operation with the previous content of the updated row.

This kind SHOULD occur together with UPDATE_AFTER for modelling an update that needs to retract the previous row first. It is useful in cases of a non-idempotent update, i.e., an update of a row that is not uniquely identifiable by a key.

UPDATE_AFTER

public static final RowKind UPDATE_AFTER

Update operation with new content of the updated row.

This kind CAN occur together with UPDATE_BEFORE for modelling an update that needs to retract the previous row first. OR it describes an idempotent update, i.e., an update of a row that is uniquely identifiable by a key.

DELETE

public static final RowKind DELETE

Deletion operation.

方法详细资料

values

public static RowKind[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (RowKind c : RowKind.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static RowKind valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

shortString

public String shortString()

Returns a short string representation of this RowKind.

• "+I" represents INSERT.
• "-U" represents UPDATE_BEFORE.
• "+U" represents UPDATE_AFTER.
• "-D" represents DELETE.

toByteValue

public byte toByteValue()

Returns the byte value representation of this RowKind. The byte value is used for serialization and deserialization.

• "0" represents INSERT.
• "1" represents UPDATE_BEFORE.
• "2" represents UPDATE_AFTER.
• "3" represents DELETE.

isRetract

public boolean isRetract()

Is UPDATE_BEFORE or DELETE.

isAdd

public boolean isAdd()

Is INSERT or UPDATE_AFTER.

fromByteValue

public static RowKind fromByteValue(byte value)

Creates a RowKind from the given byte value. Each RowKind has a byte value representation.

另请参阅:

for mapping of byte value and {@link RowKind}.

fromShortString

public static RowKind fromShortString(String value)

Creates a RowKind from the given short string.

另请参阅:

for mapping of string and {@link RowKind}.