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

I have solved this issue using the joda-time library by mapping on the DataFrame and converting the DateTime into a String :

import org.joda.time._
val time_col = sqlContext.sql("select ts from mr")
                         .map(line => new DateTime(line(0)).toString("yyyy-MM-dd"))