问题描述
在 Hive 中是否有一个函数可以用来将分钟(int)添加到类似于 DATEADD (datepart,number,date)
in sql server where datepart
的日期时间> 可以是 minutes
:DATEADD(minute,2,'2014-07-06 01:28:02')
返回 2014-07-06 01:28:02
另一方面,Hive 的 date_add(string startdate, int days)
在 days
中.hours
中的任何一个?
Is there a function in Hive one could use to add minutes(in int) to a datetime similar to DATEADD (datepart,number,date)
in sql server where datepart
can be minutes
:DATEADD(minute,2,'2014-07-06 01:28:02')
returns 2014-07-06 01:28:02
On the other hand, Hive's date_add(string startdate, int days)
is in days
. Any of such for hours
?
推荐答案
您的问题可以通过 HiveUdf 轻松解决.
your problem can easily solve by HiveUdf.
package HiveUDF;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import org.apache.hadoop.hive.ql.exec.UDF;
public class addMinuteUdf extends UDF{
final long ONE_MINUTE_IN_MILLIS=60000;
private SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
public String evaluate(String t, int minute) throws ParseException{
long time=formatter.parse(t.toString()).getTime();
Date AddingMins=new Date(time + (minute * ONE_MINUTE_IN_MILLIS));
String date = formatter.format(AddingMins);
return date;
}
}
创建 AddMinuteUdf.jar 后,在 Hive 中注册;
After creating AddMinuteUdf.jar , Register it in Hive;
ADD JAR /home/Kishore/AddMinuteUdf.jar;
create temporary FUNCTION addMinute as 'HiveUDF.addMinuteUdf';
hive> select date from ATable;
OK
2014-07-06 01:28:02
Time taken: 0.108 seconds, Fetched: 1 row(s)
应用函数后
hive> select addMinuteUdf(date, 2) from ATable;
OK
2014-07-06 01:30:02
Time taken: 0.094 seconds, Fetched: 1 row(s)
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