[jira] [Created] (FLINK-13563) TumblingGroupWindow should implement toString method

[Shang Yuanchun (Jira)]

godfrey he created FLINK-13563:
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             Summary: TumblingGroupWindow should implement toString method
                 Key: FLINK-13563
                 URL: https://issues.apache.org/jira/browse/FLINK-13563
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.9.0, 1.10.0
            Reporter: godfrey he
             Fix For: 1.9.0, 1.10.0


{code:scala}
  @Test
  def testAllEventTimeTumblingGroupWindowOverTime(): Unit = {
    val util = streamTestUtil()
    val table = util.addDataStream[(Long, Int, String)](
      "T1", 'long, 'int, 'string, 'rowtime.rowtime)

    val windowedTable = table
      .window(Tumble over 5.millis on 'rowtime as 'w)
      .groupBy('w)
      .select('int.count)
    util.verifyPlan(windowedTable)
  }
{code}

currently, it's physical plan is

{code:java}
HashWindowAggregate(window=[TumblingGroupWindow], select=[Final_COUNT(count$0) AS EXPR$0])
+- Exchange(distribution=[single])
   +- LocalHashWindowAggregate(window=[TumblingGroupWindow], select=[Partial_COUNT(int) AS count$0])
      +- TableSourceScan(table=[[default_catalog, default_database, Table1, source: [TestTableSource(long, int, string)]]], fields=[long, int, string])
{code}

we know nothing about the TumblingGroupWindow except its name




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