Hive uses IF(condition, expression, expression), so when I want to do if / else if / else if / else, I have to do:
IF(a, 1, IF(b, 2, IF(c, 3, 4)))
Is there a better way to do this that's more readable?
Looking for something similar to the standard
if (a) {
1
} else if (b) {
2
} else if (c) {
3
} else {
4
}
You can use Hive Conditional CASE WHEN
function for if-else scenario. The CASE Statement
will provide you better readability with the same functionality.
CASE
WHEN (condition1) THEN result1
WHEN (condition2) THEN result2
WHEN (condition3) THEN result3
WHEN (condition4) THEN result4
ELSE result_default
END AS attribute_name