[jira] [Updated] (DRILL-2748) Filter is not pushed down into subquery with the group by

["Jacques Nadeau (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DRILL-2748?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jacques Nadeau updated DRILL-2748:
----------------------------------
    Component/s: Query Planning & Optimization

> Filter is not pushed down into subquery with the group by
> ---------------------------------------------------------
>
>                 Key: DRILL-2748
>                 URL: https://issues.apache.org/jira/browse/DRILL-2748
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Query Planning & Optimization
>    Affects Versions: 0.9.0
>            Reporter: Victoria Markman
>
> I'm not sure about this one, theoretically filter could have been pushed into the subquery.
> {code}
> 0: jdbc:drill:schema=dfs> explain plan for select x, y, z from (select a1, b1, avg(a1) from t1 group by a1, b1) as sq(x, y, z) where x = 10;
> +------------+------------+
> |    text    |    json    |
> +------------+------------+
> | 00-00    Screen
> 00-01      Project(x=[$0], y=[$1], z=[$2])
> 00-02        Project(x=[$0], y=[$1], z=[CAST(/(CastHigh(CASE(=($3, 0), null, $2)), $3)):ANY NOT NULL])
> 00-03          SelectionVectorRemover
> 00-04            Filter(condition=[=($0, 10)])
> 00-05              HashAgg(group=[{0, 1}], agg#0=[$SUM0($0)], agg#1=[COUNT($0)])
> 00-06                Project(a1=[$1], b1=[$0])
> 00-07                  Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:/drill/testdata/predicates/t1]], selectionRoot=/drill/testdata/predicates/t1, numFiles=1, columns=[`a1`, `b1`]]])
> {code}



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