Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/18991
Since I saw you are also working on the enhancement of ORC reader/writer,
we need to check all the limits (value ranges). I am not sure how good Apache
ORC/Parquet did in their test case design. Hopefully, they already have good
enough end-to-end test cases, and then we can directly import them. Otherwise,
we have to build our own framework for it.
For examples, below is the limit of DB2 z/OS.
https://www.ibm.com/support/knowledgecenter/en/SSEPEK_10.0.0/sqlref/src/tpc/db2z_limits.html
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