Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/10796#discussion_r49950591
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
---
@@ -651,12 +651,11 @@ object HiveTypeCoercion {
case e if !e.childrenResolved => e
// Find tightest common type for If, if the true value and false
value have different types.
case i @ If(pred, left, right) if left.dataType != right.dataType =>
- findTightestCommonTypeToString(left.dataType, right.dataType).map
{ widestType =>
+ findWiderTypeForTwo(left.dataType, right.dataType).map {
widestType =>
--- End diff --
Just curious why we need to change this?
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