Github user mgaido91 commented on the issue:
https://github.com/apache/spark/pull/21599
@cloud-fan I think this is just a wrong behavior (being against SQL
standard is not the only issue), so I am not sure that makes sense to have it
controlled by a config. Anyway, I agree that as it is a behavior change, we can
target it for 3.0 and add some documentation for it now, in order to let users
know about this issue.
Thanks.
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