org.apache.orc

枚举 OrcFile.Version

java.lang.Object

java.lang.Enum<OrcFile.Version>

org.apache.orc.OrcFile.Version

所有已实现的接口:

Serializable, Comparable<OrcFile.Version>

封闭类:

OrcFile

public static enum OrcFile.Version
extends Enum<OrcFile.Version>

Create a version number for the ORC file format, so that we can add non-forward compatible changes in the future. To make it easier for users to understand the version numbers, we use the Hive release number that first wrote that version of ORC files.

Thus, if you add new encodings or other non-forward compatible changes to ORC files, which prevent the old reader from reading the new format, you should change these variable to reflect the next Hive release number. Non-forward compatible changes should never be added in patch releases.

Do not make any changes that break backwards compatibility, which would prevent the new reader from reading ORC files generated by any released version of Hive.

枚举常量概要

枚举常量

枚举常量和说明
FUTURE The generic identifier for all unknown versions.
UNSTABLE_PRE_2_0 Do not use this format except for testing.
V_0_11
V_0_12

字段概要

字段

限定符和类型	字段和说明
static OrcFile.Version	CURRENT

方法概要

限定符和类型	方法和说明
static OrcFile.Version	byName(String name)
int	getMajor() Get the major version number.
int	getMinor() Get the minor version number.
String	getName() Get the human readable name for the version.
static OrcFile.Version	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static OrcFile.Version[]	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

V_0_11

public static final OrcFile.Version V_0_11

V_0_12

public static final OrcFile.Version V_0_12

UNSTABLE_PRE_2_0

public static final OrcFile.Version UNSTABLE_PRE_2_0

Do not use this format except for testing. It will not be compatible with other versions of the software. While we iterate on the ORC 2.0 format, we will make incompatible format changes under this version without providing any forward or backward compatibility.

When 2.0 is released, this version identifier will be completely removed.

FUTURE

public static final OrcFile.Version FUTURE

The generic identifier for all unknown versions.

字段详细资料

CURRENT

public static final OrcFile.Version CURRENT

方法详细资料

values

public static OrcFile.Version[] 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 (OrcFile.Version c : OrcFile.Version.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 OrcFile.Version 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

byName

public static OrcFile.Version byName(String name)

getName

public String getName()

Get the human readable name for the version.

getMajor

public int getMajor()

Get the major version number.

getMinor

public int getMinor()

Get the minor version number.