[jira] [Commented] (CALCITE-3310) Approximate and exact aggregate calls are recognized as the same during sql-to-rel conversion

["Chris Baynes (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3310?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16919340#comment-16919340 ] 

Chris Baynes commented on CALCITE-3310:
---------------------------------------

I may be wrong here but I seem to remember that the approximate flag is kept on the RelNode, it's just not printed in the plan.

> Approximate and exact aggregate calls are recognized as the same during sql-to-rel conversion
> ---------------------------------------------------------------------------------------------
>
>                 Key: CALCITE-3310
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3310
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.20.0
>            Reporter: Danny Chan
>            Assignee: Danny Chan
>            Priority: Major
>             Fix For: 1.21.0
>
>
> For sql:
> {code:sql}
> SELECT empno, count(distinct ename)
> approx_count_distinct(ename)
> FROM emp
> GROUP BY empno
> {code}
> After sql-to-rel conversion, the plan is:
> {code:sql}
> LogicalProject(EMPNO=[$0], EXPR$1=[$1], EXPR$2=[$1])
>   LogicalAggregate(group=[{0}], EXPR$1=[COUNT(DISTINCT $1)])
>     LogicalProject(EMPNO=[$0], ENAME=[$1])
>       LogicalTableScan(table=[[CATALOG, SALES, EMP]])
> {code}



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