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https://issues.apache.org/jira/browse/DRILL-2377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14346358#comment-14346358
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Abhishek Girish commented on DRILL-2377:
----------------------------------------
Git.Commit.ID: f7ef5ec
> UNION ALL on Aggregates with GROUP BY returns null when column aliases don't
> match
> ----------------------------------------------------------------------------------
>
> Key: DRILL-2377
> URL: https://issues.apache.org/jira/browse/DRILL-2377
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 0.8.0
> Reporter: Abhishek Girish
> Assignee: Jinfeng Ni
>
> The following query returns null :
> {code:sql}
> select x
> from
> (SELECT Sum(ss_ext_sales_price) x
> FROM store_sales
> UNION ALL
> SELECT Sum(cs_ext_sales_price) y
> FROM catalog_sales) tmp
> GROUP BY x;
> Results from Drill:
> +------------+
> | x |
> +------------+
> | null |
> +------------+
> 1 row selected (3.458 seconds)
> Results from Postgres:
> x
> ---------------
> 3658019159.35
> 5265207074.51
> (2 rows)
> {code}
> Removing the GROUP BY returns correct results:
> {code:sql}
> select x
> from
> (SELECT Sum(ss_ext_sales_price) x
> FROM store_sales
> UNION ALL
> SELECT Sum(cs_ext_sales_price) y
> FROM catalog_sales) tmp
> Results from Drill:
> +------------+
> | x |
> +------------+
> | 5265207074.51 |
> | 3658019159.35 |
> +------------+
> 2 rows selected (3.46 seconds)
> {code}
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