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From "Khurram Faraaz (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4494) Window sum over integer column returns incorrect results.
Date Thu, 10 Mar 2016 06:13:40 GMT
Khurram Faraaz created DRILL-4494:
-------------------------------------

             Summary: Window sum over integer column returns incorrect results.
                 Key: DRILL-4494
                 URL: https://issues.apache.org/jira/browse/DRILL-4494
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Flow
    Affects Versions: 1.6.0
         Environment: 4 node cluster CentOS
            Reporter: Khurram Faraaz
            Priority: Critical


Window sum over integer column returns incorrect results.

Drill 1.6.0, git commit ID : git.commit.id=64ab0a8e

{noformat}

Note that Drill returns the same value for SUM(c2) in the below query.

0: jdbc:drill:schema=dfs.tmp> select SUM(c2) OVER w as w_sum from ( SELECT * FROM t_alltype
ORDER BY c1,c2 DESC NULLS LAST ) subquery WINDOW w AS (PARTITION BY c8 ORDER BY c2 DESC NULLS
FIRST RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING);
+---------------+
|     w_sum     |
+---------------+
| -16323034011  |
| -16323034011  |
| -16323034011  |
...
| -16323034011  |
| -16323034011  |
| -16323034011  |
| -16323034011  |
| -16323034011  |
+---------------+
145 rows selected (0.683 seconds)
{noformat}

Postgres 9.3

{noformat}
postgres=#   select SUM(c2) OVER w as w_sum from ( SELECT * FROM t_alltype ORDER BY c1,c2
DESC NULLS LAST ) subquery WINDOW w AS (PARTITION BY c8 ORDER BY c2 DESC NULLS FIRST RANGE
BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING);
    w_sum
-------------
 -8995559793
 -8995559793
 -8995559793
 -8995559793
 -8995559793
 -8995559793
 -8995559793
 ...
 -9169127412
 -9169127412
 -9169127412
 -9169127412
 -9169127412
 -9169127412
 -9169127412
 -9169127412
 ...
  1841653194
  1841653194
  1841653194
  1841653194
  1841653194
(145 rows)

Both in Drill and on Postgres there are 142 distinct rows and three nulls of the 145 total
rows, in column c2.

{noformat}
0: jdbc:drill:schema=dfs.tmp> select count(distinct c2) from t_alltype;
+---------+
| EXPR$0  |
+---------+
| 142     |
+---------+
1 row selected (0.682 seconds)
0: jdbc:drill:schema=dfs.tmp> select c2 from t_alltype where c2 is null;
+-------+
|  c2   |
+-------+
| null  |
| null  |
| null  |
+-------+
3 rows selected (0.389 seconds)
{noformat}

{noformat}
postgres=#  select count(distinct c2) from t_alltype;
 count
-------
   142
(1 row)

postgres=# select c2 from t_alltype where c2 is null;
 c2
----



(3 rows)
{noformat}



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