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https://issues.apache.org/jira/browse/CALCITE-3780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17177512#comment-17177512
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Rui Wang commented on CALCITE-3780:
-----------------------------------
I will wait https://github.com/apache/calcite/pull/2103 be merged and then
draft the PR to make key descriptor optionally. #2103 is doing a big
refactoring.
> 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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