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https://issues.apache.org/jira/browse/DRILL-4902?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gautam Kumar Parai reassigned DRILL-4902:
-----------------------------------------

    Assignee: Gautam Kumar Parai

> nested aggregate query does not complain about missing GROUP BY clause
> ----------------------------------------------------------------------
>
>                 Key: DRILL-4902
>                 URL: https://issues.apache.org/jira/browse/DRILL-4902
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Flow
>    Affects Versions: 1.9.0
>            Reporter: Khurram Faraaz
>            Assignee: Gautam Kumar Parai
>              Labels: window_function
>
> A nested aggregate windowed query does not report an error when the 
> partitioning column is not used in the GROUP BY clause.
> Drill 1.9.0
> This is the correct expected behavior.
> {noformat}
> 0: jdbc:drill:schema=dfs.tmp> select count(max(c7)) over (partition by c8) 
> from `DRILL_4589`;
> Error: VALIDATION ERROR: From line 1, column 42 to line 1, column 43: 
> Expression 'c8' is not being grouped
> SQL Query null
> [Error Id: 09c837b9-7a66-4a1f-9fbc-522160947274 on centos-01.qa.lab:31010] 
> (state=,code=0)
> {noformat}
> The below query too should report above error, as the GROUP BY on 
> partitioning column is missing.
> {noformat}
> 0: jdbc:drill:schema=dfs.tmp> select count(max(c7)) over (partition by c8) 
> from (select * from `DRILL_4589`);
> +---------+
> | EXPR$0  |
> +---------+
> | 1       |
> +---------+
> 1 row selected (193.71 seconds)
> {noformat}
> Postgres 9.3 also reports an error for a similar query
> {noformat}
> postgres=# select count(max(c1)) over (partition by c2) from (select * from 
> t222) sub_query;
> ERROR:  column "sub_query.c2" must appear in the GROUP BY clause or be used 
> in an aggregate function
> LINE 1: select count(max(c1)) over (partition by c2) from (select * ...
> {noformat}



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