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https://issues.apache.org/jira/browse/CALCITE-4337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17214093#comment-17214093
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Rui Wang commented on CALCITE-4337:
-----------------------------------
Thanks Danny to file this Jira. also cc [~jark] to move discussions here.
Another question of mine is, will a GROUP BY help you partition the table
function and also enable adding exchange operator by optimizer?
I agree PARTITION BY is defined by SQL standard and we can support it. But
before that, just trying to understand your use case and see if existing syntax
can help.
> 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
> Fix For: 1.27.0
>
>
> 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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