Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/7605#discussion_r35388505
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
---
@@ -166,55 +171,50 @@ object HiveTypeCoercion {
* - IntegerType to FloatType
* - LongType to FloatType
* - LongType to DoubleType
+ * - DecimalType to Double
+ *
+ * This rule is only applied to Union/Except/Intersect
*/
object WidenTypes extends Rule[LogicalPlan] {
--- End diff --
rename this to WidenSetOperationTypes
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