Hi Sonia and Abhishek, I wouldn't recommend using a hardcoded number (like 28800) for calculating time in PST/PDT. That would bite you when daylight savings kick in and out. If you look at the source code of the from_unixtime UDF, you will find that it uses the default time zone set in the JVM.
There are options: 1) You can create your own UDF that converts UTC time to your format using a hardcoded timezone. 2) You can set the default timezone of the JVM and simply use regular from_unixlike UDF. I would recommend the 2nd option. To do so, you can set the property named mapred.child.java.opts in hive-site.xml with a value like (verify your own timezone from http://en.wikipedia.org/wiki/List_of_tz_database_time_zones): -Duser.timezone=America/Los_Angeles Good luck! Mark ----- Original Message ----- From: "Abhishek Pratap Singh" <manu.i...@gmail.com> To: user@hive.apache.org Sent: Thursday, December 1, 2011 1:28:36 PM Subject: Re: Convert UTC timestamp to PST hi Sonia, Try this SELECT from_unixtime((unix_timestamp(TXN_DATE) - 28800), 'yyyy-MM-dd HH:MM:SS') as TXNDATE 28800 is the 8 hours difference in seconds for PDT. ~Abhishek On Thu, Dec 1, 2011 at 10:21 AM, sonia gehlot < sonia.geh...@gmail.com > wrote: Hi All, I have Unix timestamp in my table in UTC format. Is there is any inbuilt function to convert it into PST or PDT in YYYY-MM-DD HH:MM:SS format? I know there are functions like from_unixtime to convert unixtime to date format, but I am not sure how to convert it to PST. Thanks in advance, Sonia
