Github user kiszk commented on a diff in the pull request:
https://github.com/apache/spark/pull/22708#discussion_r225440522
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/objects/objects.scala
---
@@ -30,6 +30,7 @@ import org.apache.spark.serializer._
import org.apache.spark.sql.Row
import org.apache.spark.sql.catalyst.{CatalystTypeConverters, InternalRow,
ScalaReflection}
import org.apache.spark.sql.catalyst.ScalaReflection.universe.TermName
+import org.apache.spark.sql.catalyst.analysis.UnresolvedException
--- End diff --
nit: it does not seem to be necessary.
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