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https://issues.apache.org/jira/browse/CALCITE-3847?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-3847:
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Labels: pull-request-available (was: )
> Decorrelation for join with lateral table outputs wrong plan if the join
> condition contains correlation variables
> -----------------------------------------------------------------------------------------------------------------
>
> Key: CALCITE-3847
> URL: https://issues.apache.org/jira/browse/CALCITE-3847
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.22.0
> Reporter: Danny Chen
> Assignee: Danny Chen
> Priority: Major
> Labels: pull-request-available
> Fix For: 1.23.0
>
>
> After CALCITE-2004, we can decorrelate plan for query:
> {code:sql}
> select deptno, r.num from dept join
> lateral table(ramp(dept.deptno)) as r(num)
> on deptno=num
> {code}
> to plan like:
> {code:xml}
> LogicalProject(DEPTNO=[$0], NUM=[$2])
> LogicalJoin(condition=[=($0, $2)], joinType=[inner])
> LogicalTableScan(table=[[CATALOG, SALES, DEPT]])
> LogicalTableFunctionScan(invocation=[RAMP($cor0.DEPTNO)],
> rowType=[RecordType(INTEGER I)])
> {code}
> See there was a correlate variable left.
> To fix this, i would suggest to stop decorrelating when we encounter the
> correlate variables in LogicalTableFunctionScan.
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