Hive query with case statement - date

Question

I am trying to use a field in my data called priority in order to drive a numerical value for the DATE_ADD function. Essentially, the priority determines how many days before the issue is out of SLA.
I am trying to use this priority by saying:
pseudo code - If priority=p0, DATE_ADD (date, INTERVAL 1 day) Else If priority=p1, DATE_ADD (date, INTERVAL 15 day)
Here is my code I am trying:
SELECT
jira.jiraid as `JIRA / FR`,
jira.priority as `Priority`,
DATE_FORMAT(jira.created,"MM/dd/Y") as `Date Jira Created`,
DATE_FORMAT(DATE_ADD(jira.created, INTERVAL
CASE jira.status
WHEN "P0" THEN 1
WHEN "P1" THEN 15
WHEN "P2" THEN 40
WHEN "P3" THEN 70
ELSE 70
END day),"MM/dd/Y") as `Date when Out of SLA`
FROM jira
Does hive support this type of if/else statements?

Answer 1

You do not need to use INTERVAL in Hive for adding days. date_add function accepts integer days. Calculate interval in the subquery, this will work and look cleaner:
select
s.jiraid as `JIRA / FR`,
s.priority as `Priority`,
DATE_FORMAT(s.created,'MM/dd/Y') as `Date Jira Created`,
DATE_FORMAT(DATE_ADD(s.created, s.days_interval),'MM/dd/Y') as `Date when Out of SLA`
from
(
SELECT
j.jiraid,
j.priority,
j.created,
CASE j.status
WHEN 'P0' THEN 1
WHEN 'P1' THEN 15
WHEN 'P2' THEN 40
ELSE 70
END as days_interval
FROM jira j
)s;
Though you can calculate case statement inside date_add function, placing case statement as a function parameter and it should also work.