AngersZhuuuu commented on pull request #27983:
URL: https://github.com/apache/spark/pull/27983#issuecomment-641669177
> I have not looked at details yet. Generally I think this PR includes both
refactoring Hive ScriptTransformation and adding ScriptTransformation in
sql/core. Maybe we can refactor it first and add ScriptTransformation in
sql/core later.
There are some problem in current ScriptTransformation:
1. support use transform with aggregation
[SPARK-28227](https://issues.apache.org/jira/browse/SPARK-28227)
2. support array/map as transform's input
[SPARK-22435](https://issues.apache.org/jira/browse/SPARK-22435)
3. Handle DateType/TimestampType un correctly.
In pr https://issues.apache.org/jira/browse/SPARK-28227 , I was suggest to
implement in sql/core first. In my opinion, both way is clear if we design
this part well.
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