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https://issues.apache.org/jira/browse/FLINK-24024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Jark Wu reassigned FLINK-24024:
-------------------------------
Assignee: JING ZHANG
> Fix syntax mistake in session Window TVF
> -----------------------------------------
>
> Key: FLINK-24024
> URL: https://issues.apache.org/jira/browse/FLINK-24024
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Affects Versions: 1.14.0
> Reporter: JING ZHANG
> Assignee: JING ZHANG
> Priority: Blocker
>
> There is a syntax mistake in session Window TVF in FLINK-23543.
> For example, the following SQL has syntax mistake.
>
> {code:java}
> """
> |SELECT
> | a,
> | window_start,
> | window_end,
> | count(*),
> | sum(d),
> | max(d) filter (where b > 1000),
> | count(distinct c) AS uv
> |FROM TABLE(
> | SESSION(
> | TABLE MyTable,
> | DESCRIPTOR(proctime),
> | INTERVAL '5' MINUTE))
> |GROUP BY a, window_start, window_end
> """.stripMargin
> {code}
>
> It should updated to the following SQL, while partition key (a) should be
> moved into SESSION
> Window TVF based on Calcite [SESSION window
> TVF|https://calcite.apache.org/docs/reference.html#session].
>
> {code:java}
> val sql =
> """
> |SELECT
> | a,
> | window_start,
> | window_end,
> | count(*),
> | sum(d),
> | max(d) filter (where b > 1000),
> | count(distinct c) AS uv
> |FROM TABLE(
> | SESSION(
> | TABLE MyTable,
> | DESCRIPTOR(proctime),
> | DESCRIPTOR(a)
> | INTERVAL '5' MINUTE))
> |GROUP BY a, window_start, window_end
> """.stripMargin{code}
>
> To fix the bug, we only need update Session Window TVF syntax, we don't need
> update the operator part.
> Besides, we should check group keys of window aggregate should only contain
> window_start, window_end, partition_key. group keys could not contain other
> fields.
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