How to convert unix timestamp to date in Spark

Question

I have a data frame with a column of unix timestamp(eg.1435655706000), and I want to convert it to data with format \'yyyy-MM-DD\', I\'ve tried nscala-time but it doesn\'t w

Answer 1

Here it is using Scala DataFrame functions: from_unixtime and to_date

// NOTE: divide by 1000 required if milliseconds
// e.g. 1446846655609 -> 2015-11-06 21:50:55 -> 2015-11-06 
mr.select(to_date(from_unixtime($"ts" / 1000)))