Hive date function to achieve day of week

Question

I\'m looking for a workaround or hive date functions that gives day of the week ,

Sunday - 1
Monday - 2
Tuesday - 3
Wednesday - 4
Thursday - 5
Friday - 6
Sat         


        

Answer 1

As I said you need to write a UDF which will accept a string as parameter and return a string. Inside the UDF you need to do these steps:

1.) Parse the input string using SimpleDateFormat(YYYYMMDD)

2.) Use the Below code to get the day of week:

Calendar c = Calendar.getInstance();
c.setTime(yourDate);
int dayOfWeek = c.get(Calendar.DAY_OF_WEEK);

3.) Use this dayOfWeek value in a case statement to get your weekday String and return that string.

Hope this helps...!!!