is there any function in Hive similiar to decode in Oracle?

Question

I\'m looking for a string function that works like Oracle\'s DECODE Having table tab with a single column col

col
----
a
b
c
d
         


        

Answer 1

You could write a nested if statement.

Query:

select col
  , if(col='a', 1, if(col='b', 2, 9)) dec
from table

Output:

---------
col | dec
---------
 a     1
 b     2
 c     9
 d     9