cloud-fan commented on a change in pull request #29643:
URL: https://github.com/apache/spark/pull/29643#discussion_r484465986
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
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@@ -408,16 +401,13 @@ object TypeCoercion {
}
/** Given a plan, add an extra project on top to widen some columns' data
types. */
- private def widenTypes(plan: LogicalPlan, targetTypes: Seq[DataType])
- : (LogicalPlan, LogicalPlan) = {
+ private def widenTypes(plan: LogicalPlan, targetTypes: Seq[DataType]):
LogicalPlan = {
val casted = plan.output.zip(targetTypes).map {
case (e, dt) if e.dataType != dt =>
- val alias = Alias(Cast(e, dt), e.name)(exprId = e.exprId)
- alias -> alias.newInstance()
- case (e, _) =>
- e -> e
- }.unzip
- Project(casted._1, plan) -> Project(casted._2, plan)
+ Alias(Cast(e, dt, Some(SQLConf.get.sessionLocalTimeZone)), e.name)()
Review comment:
otherwise `WidenSetOperationTypes` will return invalid attribute mapping
(unresolved Alias with unresolved cast) when calling
`resolveOperatorsUpWithNewOutput`
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