[jira] [Created] (FLINK-19926) Wrong results for join post tumble grouping

[Satyam Shekhar (Jira)]

Satyam Shekhar created FLINK-19926:
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             Summary: Wrong results for join post tumble grouping
                 Key: FLINK-19926
                 URL: https://issues.apache.org/jira/browse/FLINK-19926
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Runtime
    Affects Versions: 1.11.1
         Environment: Flink version: 1.11.1
            Reporter: Satyam Shekhar


I have a table T0 with the following schema -

{{root}}
     |-- amount: BIGINT
     |-- timestamp: TIMESTAMP(3)

 

The table T0 has two rows -
|amount|timestamp|
|0|0|
|1|86400000|

 

The following query with tumble grouping returns wrong result -

{{WITH CTE AS (}}

{{  SELECT SUM(amount) AS _output, }}

{{         TUMBLE_END(`timestamp`, INTERVAL '1' SECOND) AS _dim0 }}

{{     FROM T0 GROUP BY TUMBLE(`timestamp`, INTERVAL '1' SECOND) )}}
{{ SELECT V0._output as V0_output, V1._output AS V1_output, }}

{{       V0._dim0 as V0_time, }}{{V1._dim0 as V1_time }}

{{     FROM CTE as V0 INNER JOIN CTE V1 ON V0._dim0 = V1._dim0}}

 

The returned result is -
|V0_output|V1_output|V0_time|V1_time|
|1|1|86401000|86401000|

 

The expected result is -
|V0_output|V1_output|V0_time|V1_time|
|0|0|1000|1000|
|1|1|86401000|86401000|

 

Running subquery for `CTE` returns the correct result -

{{SELECT SUM(amount) AS _output, }}

{{       TUMBLE_END(`timestamp`, INTERVAL '1' SECOND) AS _dim0 }}

{{  FROM T0 GROUP BY TUMBLE(`timestamp`, INTERVAL '1' SECOND)}}

{{Result (this is correct) -}}
|_output|_dim0|
|0|1000|
|1|86401000|



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