libenchao commented on a change in pull request #11215:
[FLINK-16275][table-planner-blink] AggsHandlerCodeGenerator can fail …
URL: https://github.com/apache/flink/pull/11215#discussion_r384431171
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File path:
flink-table/flink-table-planner-blink/src/test/scala/org/apache/flink/table/planner/runtime/batch/sql/OverWindowITCase.scala
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@@ -23,16 +23,20 @@ import org.apache.flink.api.java.tuple.{Tuple1 => JTuple1}
import org.apache.flink.api.java.typeutils.{RowTypeInfo, TupleTypeInfo}
import org.apache.flink.api.scala._
import org.apache.flink.table.api.Types
-import org.apache.flink.table.functions.AggregateFunction
+import org.apache.flink.table.functions.{AggregateFunction,
FunctionDefinition, ScalarFunctionDefinition}
+import org.apache.flink.table.module.{CoreModule, Module}
import org.apache.flink.table.planner.runtime.utils.BatchTestBase
import org.apache.flink.table.planner.runtime.utils.BatchTestBase.row
import org.apache.flink.table.planner.runtime.utils.TestData._
+import
org.apache.flink.table.planner.runtime.utils.UserDefinedFunctionTestUtils.MyIsNull
import org.apache.flink.table.planner.utils.DateTimeTestUtil._
import org.apache.flink.types.Row
import org.junit.{Before, Test}
import java.lang.{Iterable => JIterable, Long => JLong}
+import java.util
+import java.util.{Collections, Optional}
Review comment:
`java.util` already contains `java.util.{Collections, Optional}` ?
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