https://swalloow.github.io/hive-metastore-issue/
https://medium.com/@an_chee/why-using-mixed-case-field-names-in-hive-spark-sql-is-a-bad-idea-95da8b6ec1e0
https://hellomuzi.tistory.com/56
https://www.codenong.com/cs106837148/
스키마 추가 했을 때 문제 https://stackoverflow.com/questions/60040363/spark-sql-does-not-pick-up-changes-in-hive-table-schema
