# Case operator.

eval
CASE WHEN true THEN 1 END
----
1

eval
CASE WHEN false THEN 1 END
----
NULL

eval
CASE WHEN false THEN 1 ELSE 2 END
----
2

eval
CASE WHEN false THEN 1 WHEN false THEN 2 END
----
NULL

eval
CASE 1+1 WHEN 1 THEN 1 WHEN 2 THEN 2 END
----
2

eval
CASE 1+2 WHEN 1 THEN 1 WHEN 2 THEN 2 ELSE 5 END
----
5
