Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/21822#discussion_r204957474
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/TypeCoercion.scala
---
@@ -751,7 +751,8 @@ object TypeCoercion {
*/
case class ConcatCoercion(conf: SQLConf) extends TypeCoercionRule {
- override protected def coerceTypes(plan: LogicalPlan): LogicalPlan =
plan transform { case p =>
+ override protected def coerceTypes(
+ plan: LogicalPlan): LogicalPlan = plan resolveOperatorsDown { case p
=>
--- End diff --
im using a weird wrapping here to minimize the diff.
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