Github user mgaido91 commented on the issue:
https://github.com/apache/spark/pull/21363
@sergey-rubtsov we have to keep backward compatibility. If a user upgrades,
with your change a running application may break because of data not being
anymore timestamp but date. We can add a new entry in `SQLConf` for that.
Moreover, we have to mention in the migration guide all the behavioral
changes we introduce.
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