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https://issues.apache.org/jira/browse/CALCITE-3340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16930783#comment-16930783
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Julian Hyde commented on CALCITE-3340:
--------------------------------------

Well, the PR doesn't do quite what the JIRA case promises. You've added a table 
function called "TUMBLE_TABLE_FUNCTION" not "TUMBLE".

I see a couple of spurious changes in formatting, and a lot of classes, methods 
and fields added with no javadoc. Without javadoc it's difficult to know the 
intent of this code.

> Make TUMBLE be accepted as an operand for COLLECTION_TABLE(TABLE syntax) in 
> validator
> -------------------------------------------------------------------------------------
>
>                 Key: CALCITE-3340
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3340
>             Project: Calcite
>          Issue Type: Sub-task
>            Reporter: Rui Wang
>            Assignee: Rui Wang
>            Priority: Major
>
> For query:
> SELECT *
> FROM TABLE(TUMBLE(
> TABLE ORDERS,
> DESCRIPTOR(ROWTIME),
> INTERVAL '10' MINUTE))
> (note reuse TUMBLE operator than use a new unresolved one)
> Calcite validator will does a step to do registration and 
> "TABLE(TUMBLE(...))" will hit [1], where "TUMBLE(...)" will be passed to [2] 
> again but there is no matching  Sqlkind handling for "TUMBLE" (note that 
> TUMBLE's node kind is TUMBLE). 
> It seems we should support TUMBLE in [2]. The details of how to support it 
> needs a bit more discussion and prototyping.
> [1]: 
> https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java#L2244
> [2]:https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/sql/validate/SqlValidatorImpl.java#L2031



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