T2 - A better UDF API for Spark SQL

Currently in alpha state

TODO

https://issues.apache.org/jira/browse/SPARK-23818 compare with transport

• Better primitives,
• Better collections API
• Better expressions API for
• Type safety
• no per record instanceof checks and per record figuring out which data type it is
• apache/spark#5154
• useful for ML while keeping the generic nature of API
• without stddata everywhere
• https://github.com/lesbroot/typedudf/tree/master/src/main/scala/typedudf