beyond1920 commented on a change in pull request #14830:
URL: https://github.com/apache/flink/pull/14830#discussion_r633364916
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File path:
flink-table/flink-table-planner-blink/src/test/scala/org/apache/flink/table/planner/runtime/stream/sql/GroupWindowITCase.scala
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@@ -18,6 +18,8 @@
package org.apache.flink.table.planner.runtime.stream.sql
+import java.math.BigDecimal
Review comment:
@godfreyhe Thanks for the review, I have addressed all your comments,
including add UT and IT about window aggregate consumes upsert input stream.
please have a look, Thanks.
BTW, an unexpected exception is thrown out when add IT for window aggregate
consumes upsert input stream. I create an issue
[FLINK-22680](https://issues.apache.org/jira/browse/FLINK-22680) for the bug.
And I only add a simple ITCase in `GroupWindowITCase.scala` which could avoid
the bug in this pr.
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