Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3550#discussion_r107017477
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/nodes/datastream/DataStreamOverAggregate.scala
---
@@ -17,23 +17,52 @@
*/
package org.apache.flink.table.plan.nodes.datastream
-import org.apache.calcite.plan.{RelOptCluster, RelTraitSet}
+import java.util.{ List => JList }
+
+import org.apache.flink.table.runtime.aggregate.AggregateUtil.CalcitePair
+import org.apache.calcite.plan.RelOptCluster
+import org.apache.calcite.plan.RelTraitSet
+import org.apache.calcite.rel.RelNode
+import org.apache.calcite.rel.RelWriter
+import org.apache.calcite.rel.SingleRel
import org.apache.calcite.rel.`type`.RelDataType
import org.apache.calcite.rel.core.AggregateCall
-import org.apache.calcite.rel.{RelNode, RelWriter, SingleRel}
+import org.apache.calcite.rel.core.Window
+import org.apache.calcite.rel.core.Window.Group
+import org.apache.calcite.sql.`type`.BasicSqlType
import org.apache.flink.api.java.typeutils.RowTypeInfo
import org.apache.flink.streaming.api.datastream.DataStream
-import org.apache.flink.table.api.{StreamTableEnvironment, TableException}
+import org.apache.flink.table.api.StreamTableEnvironment
+import org.apache.flink.table.api.TableException
import org.apache.flink.table.calcite.FlinkTypeFactory
-import org.apache.flink.table.runtime.aggregate._
+import org.apache.flink.table.functions.ProcTimeType
+import org.apache.flink.table.functions.RowTimeType
import org.apache.flink.table.plan.nodes.OverAggregate
+import org.apache.flink.table.runtime.aggregate.AggregateUtil
import org.apache.flink.types.Row
-import org.apache.calcite.rel.core.Window
-import org.apache.calcite.rel.core.Window.Group
-import java.util.{List => JList}
+import org.apache.calcite.sql.`type`.IntervalSqlType
+import
org.apache.flink.streaming.api.functions.AssignerWithPunctuatedWatermarks
+import org.apache.flink.streaming.api.watermark.Watermark
+import org.apache.calcite.rex.RexInputRef
+import org.apache.flink.streaming.api.windowing.evictors.TimeEvictor
+import org.apache.flink.streaming.api.windowing.assigners.GlobalWindows
+import org.apache.flink.streaming.api.windowing.triggers.CountTrigger
--- End diff --
Please remove unused imports like `CountTrigger`
---
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