Github user dilipbiswal commented on a diff in the pull request:
https://github.com/apache/spark/pull/9036#discussion_r41595658
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/HiveTypeCoercion.scala
---
@@ -304,7 +304,10 @@ object HiveTypeCoercion {
}
/**
- * Convert all expressions in in() list to the left operator type
+ * Convert the value and in list expressions to the common operator type
+ * by looking at all the argument types and finding the closest one that
+ * all the arguments can be cast to. When no common operator type is
found
+ * an Analysis Exception is raised.
--- End diff --
@cloud-fan
You are right Wenchen.I just wanted to somehow mention that an exception
will be raised on a data type mistmatch. I will reword it to the way you
suggest. ""the original one will be returned and an Analysis Exception will be
raised at type checking phase". Let me push a commit.
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