[jira] [Comment Edited] (DRILL-7348) Aggregate on Subquery with Select Distinct or UNION fails to Group By

["benj (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-7348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16947512#comment-16947512 ] 

benj edited comment on DRILL-7348 at 10/9/19 10:01 AM:
-------------------------------------------------------

I have tested in 1.15 and 1.16.
I think thata the problem of [~snapdoodle] is that date is a reserved keyword 

{code:sql}
SELECT date, COUNT(1)
FROM (
    SELECT DISTINCT id, date, status
    FROM (select 1 id, 'b' date, 3 status UNION SELECT 2, 'c', 4 UNION SELECT 1, 'c', 4) AS r1
) AS r2 
GROUP BY 1
Error: PARSE ERROR: Encountered "date ,"
{code}

So you need quote around date:

{code:sql}
SELECT `date`, COUNT(1)
FROM (
  SELECT DISTINCT id, `date`, status
  FROM (select 1 id, 'b' `date`, 3 status UNION SELECT 2, 'c', 4 UNION SELECT 1, 'c', 4) AS r1
) AS r2 
GROUP BY 1;
+-------+---------+
| date  | EXPR$1  |
+-------+---------+
| b     | 1       |
| c     | 2       |
+-------+---------+
{code}

The result is correct here.
Maybe there is also a real problem, but without the content of the file dfs.`path` it will be difficult to conclude.



was (Author: benj641):
I have tested in 1.15 and 1.16.
I think thata the problem of [~snapdoodle] is that date is a reserved keyword 

{code:code}
SELECT date, COUNT(1)
FROM (
    SELECT DISTINCT id, date, status
    FROM (select 1 id, 'b' date, 3 status UNION SELECT 2, 'c', 4 UNION SELECT 1, 'c', 4) AS r1
) AS r2 
GROUP BY 1
Error: PARSE ERROR: Encountered "date ,"
{code}

So you need quote around date:

{code:sql}
SELECT `date`, COUNT(1)
FROM (
  SELECT DISTINCT id, `date`, status
  FROM (select 1 id, 'b' `date`, 3 status UNION SELECT 2, 'c', 4 UNION SELECT 1, 'c', 4) AS r1
) AS r2 
GROUP BY 1;
+-------+---------+
| date  | EXPR$1  |
+-------+---------+
| b     | 1       |
| c     | 2       |
+-------+---------+
{code}

The result is correct here.
Maybe there is also a real problem, but without the content of the file dfs.`path` it will be difficult to conclude.


> Aggregate on Subquery with Select Distinct or UNION fails to Group By
> ---------------------------------------------------------------------
>
>                 Key: DRILL-7348
>                 URL: https://issues.apache.org/jira/browse/DRILL-7348
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Functions - Drill
>    Affects Versions: 1.15.0
>            Reporter: Keith G Yu
>            Priority: Major
>
> The following query fails to group properly.
> {code:java}
> SELECT date, COUNT(1)
> FROM (
>     SELECT DISTINCT
>         id,
>         date,
>         status
>     FROM table(dfs.`path`(type => 'text', fieldDelimiter => ',', extractHeader => TRUE))
> )
> GROUP BY 1{code}
> This also fails to group properly.
> {code:java}
> SELECT date, COUNT(1)
> FROM (
>     SELECT
>         id,
>         date,
>         status
>     FROM table(dfs.`path1`(type => 'text', fieldDelimiter => ',', extractHeader => TRUE))
>     UNION
>     SELECT
>         id,
>         date,
>         status
>     FROM table(dfs.`path2`(type => 'text', fieldDelimiter => ',', extractHeader => TRUE))
> )
> GROUP BY 1
> {code}



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