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