Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7000#discussion_r33207362
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
---
@@ -677,8 +677,8 @@ trait HiveTypeCoercion {
findTightestCommonTypeAndPromoteToString((c.key +:
c.whenList).map(_.dataType))
maybeCommonType.map { commonType =>
val castedBranches = c.branches.grouped(2).map {
- case Seq(when, then) if when.dataType != commonType =>
- Seq(Cast(when, commonType), then)
+ case Seq(whenExpr, thenExpr) if whenExpr.dataType !=
commonType =>
--- End diff --
Can we easily add a SclalaStyle check for this in order to ban this as a
variable name?
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