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https://issues.apache.org/jira/browse/CALCITE-3780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17166939#comment-17166939
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duli commented on CALCITE-3780:
-------------------------------
Hi, [~amaliujia] [~vilo]
I think this is not a problem about the position of this optional argument,
because the next argument's type is different, so we are easy to distinguish
them. And there has real scenes do need this feature, eg: similar 'AllWindow'.
> SESSION Table-valued Function
> -----------------------------
>
> Key: CALCITE-3780
> URL: https://issues.apache.org/jira/browse/CALCITE-3780
> Project: Calcite
> Issue Type: Sub-task
> Reporter: Rui Wang
> Assignee: Rui Wang
> Priority: Major
> Fix For: 1.23.0
>
>
> We can create SESSION table-valued function to replace GROUP BY SESSION for
> inactive gap session functionality:
> {code:sql}
> SELECT *
> FROM TABLE SESSION (
> data => TABLE Bid ,
> timecol => DESCRIPTOR ( bidtime ) ,
> keycol => DESCRIPTOR(key),
> inactive_gap => INTERVAL '10' MINUTES )
> {code}
>
>
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