[jira] [Commented] (CALCITE-5420) SqlToRel should populate projects corralate id for queries with aggregates.

["Julian Hyde (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-5420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17643609#comment-17643609 ] 

Julian Hyde commented on CALCITE-5420:
--------------------------------------

This feature sounds important and useful. But can you refresh my memory: is there any other decorrelation code besides SqlToRelConverter? I have a feeling that there are some planner rules. If so, do those already work, or could this work be done there?

> SqlToRel should populate projects corralate id for queries with aggregates.
> ---------------------------------------------------------------------------
>
>                 Key: CALCITE-5420
>                 URL: https://issues.apache.org/jira/browse/CALCITE-5420
>             Project: Calcite
>          Issue Type: Bug
>            Reporter: James Starr
>            Assignee: James Starr
>            Priority: Major
>
> The following query does not populate correlate id in the project:
> {code:sql}
> SELECT SUM(
>   (select char_length(dname) from "scott".dept where dept.deptno = emp.empno)) as s
> FROM "scott".emp
> {code}
> Having the correlate id populated is important for expanding nested queries.



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