Wenchen Fan created SPARK-23818:
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Summary: an official UDF interface for Spark SQL
Key: SPARK-23818
URL: https://issues.apache.org/jira/browse/SPARK-23818
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.4.0
Reporter: Wenchen Fan
Nowadays the Spark UDF interface is pretty simple: it's basically just a lambda
function.
We should come up with a new one that can:
1. operate on InternalRow directly for better performance
2. define deterministic/mutable/nullable in the UDF itself
3. java friendly
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