Github user dongjoon-hyun commented on the issue:
https://github.com/apache/spark/pull/16944
Oh, whenever I starts `spark-shell`, I should do the following, or may have
that in Spark configuration. Otherwise, it shows wrong result.
```
sql("set spark.sql.hive.caseSensitiveInferenceMode=NEVER_INFER").show
```
It looks like `NEVER_INFER` is the only safe default value for this
regression.
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