Add support for SQL CASE Statement
While U-SQL is using C# as an expression language, there are some frequent expressions in SQL that would help migrating Hive or SQL scripts to U-SQL, similar to how you have added LIKE.
David Paul Giroux commented
Please see [CASE (Transact-SQL) and ?:](https://msdn.microsoft.com/en-us/library/azure/mt771654.aspx#case) which provides an example of using ?: in lieu of CASE.
Michael Rys commented
Note that the correct way in U-SQL today is to use the ternary C# expression:
a == 1 ? "case 1" :
a == 2 ? "case 2" :
a == 3 ? "case 3" :