Mechanism for ad hoc UDFs and `DummyEncoder` implementation
Created by: jassak
- Mechanism for ad-hoc UDFs 757
- Unification of python function based UDFs (
PyUdfGenerator) and ad-hoc UDFs (AdhocUdfGenerator) behind a common factory classUdfGenerator757 - Implementation of
DummyEncoderUDFs using ad hoc UDF mechanism and re-activate related skipped tests - Small improvements of python function based UDF generator
- Various fixes in standalone tests that broke silently due to
DummyEncodertests being skipped