Github user priyankagargnitk commented on the issue:
https://github.com/apache/spark/pull/15609
Actually our use case is little different, we are not invoking it with the
Select queries.. We are using JS to let user type expressions and then we have
created out own layer on top of spark that converts this JS to Spark
expressions.. So if user writes an expression that returns date in true branch
and timestamp in false branch.. Then the IF expression fails... because it
internally getting mapped to If(Literal.create(true, BooleanType),
Literal.create(identity(1), DateType), Literal.create(identity(2L),
TimestampType)) , Which fails.
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