[jira] [Commented] (DRILL-2376) UNION ALL on Aggregates with GROUP BY returns incomplete results

["Sean Hsuan-Yi Chu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-2376?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14508372#comment-14508372 ] 

Sean Hsuan-Yi Chu commented on DRILL-2376:
------------------------------------------

That is rather weird. I use cp.`tpch/region.parquet`'s data:

select x
from
(SELECT cast(Sum(r_regionkey) as double) x
FROM  cp.`tpch/region.parquet`
UNION ALL
SELECT cast(Sum(r_regionkey) as int) y
FROM cp.`tpch/region.parquet`) tmp
GROUP BY x
ORDER BY x;

It worked fine even when I fed different types of data into union-all. Can you verify the data type of Sum(.) 's output?

> UNION ALL on Aggregates with GROUP BY returns incomplete results
> ----------------------------------------------------------------
>
>                 Key: DRILL-2376
>                 URL: https://issues.apache.org/jira/browse/DRILL-2376
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 0.9.0
>            Reporter: Abhishek Girish
>            Assignee: Sean Hsuan-Yi Chu
>             Fix For: 0.8.0
>
>
> The following query returns incomplete results:
> {code:sql}
> select x
> from
> (SELECT Sum(ss_ext_sales_price) x
> FROM  store_sales
> UNION ALL
> SELECT Sum(cs_ext_sales_price) x
> FROM catalog_sales) tmp
> GROUP BY x;
> Results from Drill:
> +------------+
> |     x      |
> +------------+
> | 3658019159.35 |
> +------------+
> 1 row selected (3.474 seconds)
> Results from Postgres:
>        x       
> ---------------
>  5265207074.51
>  3658019159.35
> (2 rows)
> {code}
> Removing GROUP BY returns the right results:
> {code:sql}
> select x
> from
> (SELECT Sum(ss_ext_sales_price) x
> FROM  store_sales
> UNION ALL
> SELECT Sum(cs_ext_sales_price) x
> FROM catalog_sales) tmp;
> Results from Drill:
> +------------+
> |     x      |
> +------------+
> | 5265207074.51 |
> | 3658019159.35 |
> +------------+
> {code}



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