[jira] [Commented] (CALCITE-4337) Supports PARTITION BY clause for table function table argument

["JING ZHANG (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-4337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17415299#comment-17415299 ] 

JING ZHANG commented on CALCITE-4337:
-------------------------------------

[~danny0405] Hi, Danny, I would like to continue to work on this issue. Good news are I have made some progress, now the demo in the Jira workes now. However, I have two points need more discussion. Any suggestion is appreciate.
 # The new syntax is conflict with current session window tvf syntax, please see more information in [https://calcite.apache.org/docs/reference.html#session.] Could we replace the old syntax directly, or take compatible into consideration.
 # Currently session window tvf support first operand is a sub query (please see the following demo). If we need support these cases, we need let sub query support partition by clause. which is more complex. 
{code:java}
select * from table(session((select * from Shipments), descriptor(rowtime), descriptor(orderId), INTERVAL '10' MINUTE))
{code}

> Supports PARTITION BY clause for table function table argument
> --------------------------------------------------------------
>
>                 Key: CALCITE-4337
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4337
>             Project: Calcite
>          Issue Type: New Feature
>          Components: core
>    Affects Versions: 1.26.0
>            Reporter: Danny Chen
>            Assignee: Danny Chen
>            Priority: Major
>
> An example from the SQL standard 2016 Polymorphic Table Functions:
> {code:sql}
> SELECT W.wstart, W.wend, OI.customer, SUM(OI.price)
> FROM TABLE(SESSION(
>   data => TABLE(order_item) AS OI PARTITION BY customer, 
>   timecol => DESCRIPTOR(order_time),
>   timeout => INTERVAL '10' MINUTE)) W
> GROUP BY 1, 2, 3
> {code}



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