回复：Timestamp functions for sqlContext

[鹰 <98...@qq.com>]

Hi Rozen,
you  can  get current time by call a java API and then get rowTimestamp by sql;
val currentTimeStamp=System.currentTimeMillis()val  rowTimestatm = sqlContext.sql("select  rowTimestamp  from tableName")

and then you can wirte a function like this

def diffDate(currentTimeStamp,rowTimeStamp  ):INT={

here is something you need to do;
}





------------------ 原始邮件 ------------------
发件人: "Tal Rozen";<ta...@scaleka.com>;
发送时间: 2015年7月22日(星期三) 凌晨0:04
收件人: "user"<us...@spark.apache.org>; 

主题: Timestamp functions for sqlContext



Hi, 

I'm running a query with sql context where one of the fields is of type java.sql.Timestamp. I'd like to set a function similar to DATEDIFF in mysql, between the date given in each row, and now. So If I was able to use the same syntax as in mysql it would be:


val date_diff_df = sqlContext.sql("select DATEDIFF(curdate(), rowTimestamp) date_diff from tableName")


What are the relevant key words to replace curdate(), and DATEDIFF?


Thanks