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https://issues.apache.org/jira/browse/DRILL-2914?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14520623#comment-14520623
]
Chun Chang commented on DRILL-2914:
-----------------------------------
plan:
{code}
0: jdbc:drill:schema=dfs.drillTestDirAdvanced> explain plan for select
gender2.gender as c0 from (SELECT * FROM customer) as gender2 group by
gender2.gender order by gender2.gender ASC NULLS LAST;
+------------+------------+
| text | json |
+------------+------------+
| 00-00 Screen
00-01 SelectionVectorRemover
00-02 Sort(sort0=[$0], dir0=[ASC-nulls-last])
00-03 Project(c0=[ITEM($0, 'gender')])
00-04 HashAgg(group=[{0}])
00-05 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
[path=maprfs:/drill/testdata/mondrian/customer]],
selectionRoot=/drill/testdata/mondrian/customer, numFiles=1, columns=[`*`]]])
{code}
> regression: Mondrian query534.q, drill give wrong result
> --------------------------------------------------------
>
> Key: DRILL-2914
> URL: https://issues.apache.org/jira/browse/DRILL-2914
> Project: Apache Drill
> Issue Type: Bug
> Components: Execution - Relational Operators
> Affects Versions: 0.9.0
> Reporter: Chun Chang
> Assignee: Chris Westin
> Priority: Critical
>
> #Wed Apr 29 14:39:22 EDT 2015
> git.commit.id.abbrev=f5b0f49
> Running mondrian tests and noticed several regressions. This one is related
> to group by with select * subquery.
> {code}
> SELECT gender2.gender AS c0
> FROM (SELECT *
> FROM customer) AS gender2
> GROUP BY gender2.gender
> ORDER BY gender2.gender ASC nulls last;
> {code}
> Correct result from postgres:
> {code}
> foodmart=# select gender2.gender as c0 from (SELECT * FROM customer) as
> gender2 group by gender2.gender order by gender2.gender ASC NULLS LAST;
> c0
> ----
> F
> M
> (2 rows)
> {code}
> Wrong result from drill:
> {code}
> 0: jdbc:drill:schema=dfs.drillTestDirAdvanced> select gender2.gender as c0
> from (SELECT * FROM customer) as gender2 group by gender2.gender order by
> gender2.gender ASC NULLS LAST;
> +------------+
> | c0 |
> +------------+
> | null |
> +------------+
> {code}
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