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Table to retractStream error #3121

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@flyxu1991

I group by TUMBLE(proctime, INTERVAL '1' DAY) in the upstream. Then it's ok when i execute tableEnv.sqlQuery.print, but when i execute tableEnv.toRetractStream(table, ROW.class),
it's error like this:
java.lang.IllegalArgumentException: Row arity: 4, but serializer arity: 3
at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copy(RowDataSerializer.java:124)
at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copy(RowDataSerializer.java:48)
What's the problem with my procedure?

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