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https://issues.apache.org/jira/browse/CALCITE-3340?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16928911#comment-16928911
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Rui Wang commented on CALCITE-3340:
-----------------------------------
Actually by the idea above(with a slight modification), I was able to quickly
prototype to pass validator and generate a logical plan as the following string
format:
{code:java}
LogicalProject(ROWTIME=[$0], ID=[$1], PRODUCT=[$2], UNITS=[$3], wstart=[$4],
wend=[$5])
LogicalTableFunctionScan(invocation=[TUMBLE_TABLE_FUNCTION($3, 60000:INTERVAL
MINUTE)], rowType=[RecordType(TIMESTAMP(0) ROWTIME, INTEGER ID, VARCHAR(10)
PRODUCT, INTEGER UNITS, TIMESTAMP(0) wstart, TIMESTAMP(0) wend)])
{code}
Apparently there should be LogicalProject generated as an input for
LogicalTableFunctionScan, which I will further investigate.
I feel like it's a good progress so far. LogicalTableFunctionScan has a return
type with two new fields appended: wstart and wend
> 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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