Github user wzhfy commented on a diff in the pull request:
https://github.com/apache/spark/pull/19635#discussion_r148924862
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
---
@@ -451,7 +451,10 @@ object TypeCoercion {
}
case i @ In(a, b) if b.exists(_.dataType != a.dataType) =>
- findWiderCommonType(i.children.map(_.dataType)) match {
+ findWiderCommonType(b.map(_.dataType)).flatMap(listDataType => {
--- End diff --
nit: `.flatMap { listDataType =>` , and remove the `)` in line 457
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