apache spark - How to get day of week in SparkSQL?

Question

I am trying to select all record recorded at Sunday through SparkSQL. I have the following try but in vain.

SELECT * FROM mytable WHERE DATEPART(WEEKDAY, create_time) = 0
SELECT * FROM mytable WHERE strftime("%w", create_time) = 0

How to get day of week in SparkSQL?

Answer 1

SPARK 1.5.0 has a date_format function that accepts a format as an argument. This format returns a name of a week day from a timestamp:

select date_format(my_timestamp, 'EEEE') from ....

Result: e.g. 'Tuesday'