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CASE WHEN expr1 THEN expr2 [WHEN expr3 THEN expr4]* [ELSE expr5] END – When `expr1` = true, returns `expr2`; else when `expr3` = true, returns `expr4`; else returns `expr5`.
Platforms: WhereOS, Spark, Hive
Class: org.apache.spark.sql.catalyst.expressions.CaseWhen

More functions can be added to WhereOS via Python or R bindings or as Java & Scala UDF (user-defined function), UDAF (user-defined aggregation function) and UDTF (user-defined table generating function) extensions. Custom libraries can be added on via Settings-page or installed from WhereOS Store.

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