com.aliyun.odps

Class PartitionSpec

java.lang.Object

com.aliyun.odps.PartitionSpec

public class PartitionSpec
extends Object

PartitionSpec类表示一个特定分区的定义

Constructor Summary

Constructors

Constructor and Description
PartitionSpec() 构造此类的对象
PartitionSpec(String spec) 通过字符串构造此类对象

Method Summary

Modifier and Type	Method and Description
String	get(String key) 获得指定分区字段值
boolean	isEmpty() 是否指定了分区字段
Set<String>	keys() 获取所有分区字段
void	set(String key, String value) 设置分区字段值
String	toString() Convert a PartitionSpec object to String.
String	toString(boolean quote, boolean useSlashDelimiter) Convert a PartitionSpec object to String.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

PartitionSpec

public PartitionSpec()

构造此类的对象

PartitionSpec

public PartitionSpec(String spec)

通过字符串构造此类对象

Parameters:

spec - 分区定义字符串，分区列之间可以用逗号 (",") 或斜线 ("/") 分隔. 例如: "pt1=foo/pt2=1" 或 "pt1=foo,pt2=1"

Method Detail

set

public void set(String key,
                String value)

设置分区字段值

Parameters:

key - 分区字段名

value - 分区字段值

get

public String get(String key)

获得指定分区字段值

Parameters:

key - 分区字段名

Returns:

分区字段值

keys

public Set<String> keys()

获取所有分区字段

Returns:

分区字段名集合

isEmpty

public boolean isEmpty()

是否指定了分区字段

Returns:

如果指定了分区字段，则返回false，否则返回true

toString

public String toString()

Convert a PartitionSpec object to String. Partition column values are quoted with single quotation marks. Partition column name and value pairs are separated with comma.

Overrides:

toString in class Object

Returns:

partition spec in string.

toString

public String toString(boolean quote,
                       boolean useSlashDelimiter)

Convert a PartitionSpec object to String. The delimiter of partition column name and value pairs can be comma (",") or slash ("/").

Parameters:

quote - quote the partition column value

useSlashDelimiter - use comma as delimiter

Returns: