apache/spark — pull request #2407 by adrian-wang (2014-09-16 10:05:39+00:00)
Title: [SPARK-3485][SQL] another way to pass to hive simple udf

This is just another solution to SPARK-3485, in addition to PR #2355
In this patch, we will use ConventionHelper and FunctionRegistry to invoke a simple udf evaluation, which rely more on hive, but much cleaner and safer.
We can discuss which one is better.