Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/7631#discussion_r35395621
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
---
@@ -181,6 +181,7 @@ object HiveTypeCoercion {
planName: String,
left: LogicalPlan,
right: LogicalPlan): (LogicalPlan, LogicalPlan) = {
+ require(left.output.length == right.output.length)
--- End diff --
Someone has tried to add this restrict before in
https://github.com/apache/spark/pull/6174, but failed as hive support different
length.
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