Peng-Lei commented on a change in pull request #34494:
URL: https://github.com/apache/spark/pull/34494#discussion_r747350973
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/Cast.scala
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@@ -598,6 +606,15 @@ abstract class CastBase extends UnaryExpression with
TimeZoneAwareExpression wit
IntervalUtils.castStringToYMInterval(s, it.startField, it.endField))
case _: YearMonthIntervalType => buildCast[Int](_, s =>
IntervalUtils.periodToMonths(IntervalUtils.monthsToPeriod(s),
it.endField))
+ case x: IntegralType if it.startField == it.endField =>
Review comment:
Oh, Maybe I made a mistake that we no need check `it.startField ==
it.endField`, because it has called the `canCast` and return false if
`it.startField != it.endField` when go here. So I think no need add error
message here. Do you think so?
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