Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/18849
If the new flag `DATASOURCE_HIVE_COMPATIBLE` is set to `true` when creating
a table, are we sure it can be `true` forever? Is it a reliable flag we can
trust? Is that possible the `ALTER TABLE` commands by the
previous/current/future versions of Spark SQL might also change the hive
compatibility?
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