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https://issues.apache.org/jira/browse/FLINK-19926?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jingsong Lee closed FLINK-19926.
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Resolution: Invalid
> 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
> Priority: Minor
> Labels: auto-deprioritized-major
>
> I have a table T0 with the following schema -
> {code:java}
> root
> |-- amount: BIGINT
> |-- timestamp: TIMESTAMP(3)
> {code}
>
> The table T0 has two rows -
> |amount|timestamp|
> |0|0|
> |1|86400000|
>
> The following query with tumble grouping returns the wrong result -
> {code:java}
> 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
> {code}
>
> 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 -
> {code:java}
> SELECT SUM(amount) AS _output,
> TUMBLE_END(`timestamp`, INTERVAL '1' SECOND) AS _dim0
> FROM T0 GROUP BY TUMBLE(`timestamp`, INTERVAL '1' SECOND)
> {code}
>
> Result (this is correct) -
> |_output|_dim0|
> |0|1000|
> |1|86401000|
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