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https://issues.apache.org/jira/browse/CALCITE-3955?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17096268#comment-17096268
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Danny Chen commented on CALCITE-3955:
-------------------------------------
After some try i have no idea yet, we may need a way to identify that the
function is a window function when do validation rewrite, [~julianhyde] any
ideas ?
> Remove the first operand of RexCall from SqlWindowTableFunction
> ---------------------------------------------------------------
>
> Key: CALCITE-3955
> URL: https://issues.apache.org/jira/browse/CALCITE-3955
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.22.0
> Reporter: Danny Chen
> Assignee: Danny Chen
> Priority: Major
> Fix For: 1.23.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> In CALCITE-3382, we introduced TUMBLE window function to replace the
> deprecated group tumble window.
> But for query
> {code:sql}
> select *
> from table(tumble(table Shipments, descriptor(rowtime), INTERVAL '1' MINUTE))
> {code}
> the outputs plan is
> {code:xml}
> LogicalProject(ORDERID=[$0], ROWTIME=[$1], window_start=[$2], window_end=[$3])
> LogicalTableFunctionScan(invocation=[TUMBLE($1, DESCRIPTOR($1),
> 60000:INTERVAL MINUTE)], rowType=[RecordType(INTEGER ORDERID, TIMESTAMP(0)
> ROWTIME, TIMESTAMP(0) window_start, TIMESTAMP(0) window_end)])
> LogicalProject(ORDERID=[$0], ROWTIME=[$1])
> LogicalTableScan(table=[[CATALOG, SALES, SHIPMENTS]])
> {code}
> The first operand of TUMBLE rex call is always the last input field, but
> actually it represents the source table which is the input rel node.
> This issue remove the first operand from the RexCall because it is useless
> and confusing.
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