Wenchen Fan created SPARK-12939:
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Summary: migrate encoder resolution to Analyzer
Key: SPARK-12939
URL: https://issues.apache.org/jira/browse/SPARK-12939
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Wenchen Fan
in https://github.com/apache/spark/pull/10747, we decided to use expressions
instead of encoders in query plans, to make the dataset easier to optimize and
make encoder resolution less hacky.
However, that PR didn't finish the migration completely and cause some
regressions which are hidden due to the lack of end-to-end test.
We should fix it by completing the migration and add end-to-end test for it
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