Timestamp functions for sqlContext

[Tal Rozen]

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