Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/19363#discussion_r143094589
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/KeyValueGroupedDataset.scala ---
@@ -18,16 +18,17 @@
package org.apache.spark.sql
import scala.collection.JavaConverters._
+import scala.util.control.NonFatal
import org.apache.spark.annotation.{Experimental, InterfaceStability}
import org.apache.spark.api.java.function._
import org.apache.spark.sql.catalyst.encoders.{encoderFor,
ExpressionEncoder}
import org.apache.spark.sql.catalyst.expressions.{Alias, Attribute,
CreateStruct}
import org.apache.spark.sql.catalyst.plans.logical._
-import org.apache.spark.sql.catalyst.streaming.InternalOutputModes
import org.apache.spark.sql.execution.QueryExecution
import org.apache.spark.sql.expressions.ReduceAggregator
import org.apache.spark.sql.streaming.{GroupState, GroupStateTimeout,
OutputMode}
+import org.apache.spark.sql.types.StructType
--- End diff --
Why import `StructType`? I didn't see you use it.
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