Github user JoshRosen commented on a diff in the pull request:
https://github.com/apache/spark/pull/7631#discussion_r35396203
--- 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 --
My patch for this was motivated by the fact that my fuzz tester was
throwing runtime errors for queries involving UNION ALL with differing numbers
of columns: if you run such a UNION ALL query and then attempt to convert the
result to a SchemaRDD you can get ArrayIndexOutOfBounds exceptions in
CatalystTypeConverters. I'll see if there's a better way to fix this issue.
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