[jira] [Assigned] (CALCITE-6746) Optimization rule ProjectWindowTranspose is unsound

["Mihai Budiu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-6746?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mihai Budiu reassigned CALCITE-6746:
------------------------------------

    Assignee: Mihai Budiu

> Optimization rule ProjectWindowTranspose is unsound
> ---------------------------------------------------
>
>                 Key: CALCITE-6746
>                 URL: https://issues.apache.org/jira/browse/CALCITE-6746
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.38.0
>            Reporter: Mihai Budiu
>            Assignee: Mihai Budiu
>            Priority: Minor
>
> Here is an an example plan before and after this rule:
> {code}
>     LogicalProject(EXPR$0=[CASE(>($3, 0), $4, null:INTEGER)], salary=[$0], enroll_date=[$1]), id = 630
>       LogicalWindow(window#0=[window(order by [1] range between $2 PRECEDING and $2 FOLLOWING aggs [COUNT($0), $SUM0($0)])]), id = 628
>         LogicalProject(salary=[$2], enroll_date=[$3], $2=[*(365, 86400000:INTERVAL DAY)]), id = 626
>           LogicalTableScan(table=[[schema, empsalary]]), id = 592
> {code}
> after:
> {code}
>     LogicalProject(EXPR$0=[CASE(>($2, 0), $3, null:INTEGER)], salary=[$0], enroll_date=[$1]), id = 645
>       LogicalWindow(window#0=[window(order by [1] range between $2 PRECEDING and $2 FOLLOWING aggs [COUNT($0), $SUM0($0)])]), id = 643
>         LogicalProject(salary=[$0], enroll_date=[$1]), id = 639
>           LogicalProject(salary=[$2], enroll_date=[$3], $2=[*(365, 86400000:INTERVAL DAY)]), id = 633
>             LogicalTableScan(table=[[schema, empsalary]]), id = 592
> {code}
> The problem is the representation of the window bound, which refers to field $2. After this optimization this field no longer exists in the project that is an input to the Window.
> I suspect that the problem is in the code ProjectWindowTransposeRule that maintains the beReferred bitset; it never adds the window bounds to this set.



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