org.apache.hadoop.mapreduce.lib.db

类 DateSplitter

java.lang.Object

org.apache.hadoop.mapreduce.lib.db.IntegerSplitter

org.apache.hadoop.mapreduce.lib.db.DateSplitter

所有已实现的接口:

DBSplitter

直接已知子类:

OracleDateSplitter

@InterfaceAudience.Public
@InterfaceStability.Evolving
public class DateSplitter
extends IntegerSplitter

Implement DBSplitter over date/time values. Make use of logic from IntegerSplitter, since date/time are just longs in Java.

构造器概要

构造器

构造器和说明
DateSplitter()

方法概要

方法

限定符和类型	方法和说明
protected String	dateToString(Date d) Given a Date 'd', format it as a string for use in a SQL date comparison operation.
List<InputSplit>	split(Configuration conf, ResultSet results, String colName) Given a ResultSet containing one record (and already advanced to that record) with two columns (a low value, and a high value, both of the same type), determine a set of splits that span the given values.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

DateSplitter

public DateSplitter()

方法详细资料

split

public List<InputSplit> split(Configuration conf,
                     ResultSet results,
                     String colName)
                       throws SQLException

从接口复制的说明: DBSplitter

Given a ResultSet containing one record (and already advanced to that record) with two columns (a low value, and a high value, both of the same type), determine a set of splits that span the given values.

指定者:

split 在接口中 DBSplitter

覆盖:

split 在类中 IntegerSplitter

抛出:

SQLException

dateToString

protected String dateToString(Date d)

Given a Date 'd', format it as a string for use in a SQL date comparison operation.

参数:

d - the date to format.

返回:

the string representing this date in SQL with any appropriate quotation characters, etc.