Github user gatorsmile commented on the issue: https://github.com/apache/spark/pull/15677 IMO, when we add the argument types in the function descriptions, we should deliver the corresponding test cases in the same PRs. Otherwise, I do not think how we can know the argument types are right or wrong, especially when we have to consider the implicit type conversion. Strictly speaking, the newly added argument types are wrong. I think we just need to remove the argument types from this PR. That is just part of this PR.
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