Github user HyukjinKwon commented on the issue: https://github.com/apache/spark/pull/15609 Then, wouldn't the responsibility of type coercion be your own layer? I guess this PR virtually mean every expression handled in `TypeCoercion` should be fixed too. For example, I guess ```scala Greatest(Seq(Literal(10, IntegerType), Literal("a", StringType))).eval() ``` wouldn't work too.
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