Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/18853
`TypeCoercionModeSuite` is an end-to-end test suite. We really need a test
case in `SQLQueryTestSuite`. That means, create a .sql file that contains all
the type mapping and implicit casting queries that can be ran in both Hive and
Spark. We can easily verify whether we correctly cover all the type coercion
compatibility issues.
Could you please do it? This must take a lot of efforts, but it really
helps us to find all the holes. Appreciate it!
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