Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/20433
This is a breaking change, I can't think of a way to work around it. e.g.
`SELECT 2 SECONDS` will change its semantic after this PR. Even if we provide a
conf, it's very hard for users to realize the semantic has been changed. I'd
like to hold this PR until Spark 3.0.
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