Hi, I'm writing this because I realize this stuff needs users to comment on before it gets set into an ABI release.
Hive 2.2.0 will check if a user's UDF has a vectorized version before wrapping it row-by-row. @VectorizedExpressions(value = { VectorStringRot13.class }) https://github.com/apache/hive/tree/master/itests/custom-udfs/udf-vectorized-badexample I have checked in a fairly bad example of this, with the vectorized & non-vectorized UDF returning different values for testing purposes. User & dev feedback would be welcome on extending base classes like the IStringUnaryUDF. Cheers, Gopal