Github user huawei-flink commented on a diff in the pull request:
https://github.com/apache/flink/pull/3547#discussion_r106222135
--- Diff:
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/plan/logical/rel/LogicalWindowAggregate.scala
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@@ -18,8 +18,6 @@
package org.apache.flink.table.plan.logical.rel
-import java.util
--- End diff --
In principle I agree, but I it caused some building problem. Is there a
practical reason for not importing the List class directly rather than creating
"half references"?
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