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Posted to issues@drill.apache.org by "Khurram Faraaz (JIRA)" <ji...@apache.org> on 2016/07/23 19:31:20 UTC
[jira] [Created] (DRILL-4803) NULLS are not first when NULLS FIRST
is used with ORDER BY in window definition
Khurram Faraaz created DRILL-4803:
-------------------------------------
Summary: NULLS are not first when NULLS FIRST is used with ORDER BY in window definition
Key: DRILL-4803
URL: https://issues.apache.org/jira/browse/DRILL-4803
Project: Apache Drill
Issue Type: Bug
Components: Execution - Flow
Affects Versions: 1.8.0
Environment: 4 node CentOS cluster
Reporter: Khurram Faraaz
NULLS FIRST is not honored when used with ORDER BY inside window definition. This in a wrong results issue.
MapR Drill 1.8.0 commit ID : 34ca63ba
{noformat}
0: jdbc:drill:schema=dfs.tmp> select c2, AVG(SUM(c1)) OVER(partition by c2 order by c2 nulls first) FROM `tblWnulls.parquet` group by c2;
+-------+----------------+
| c2 | EXPR$1 |
+-------+----------------+
| a | 11152.0 |
| b | 41.0 |
| c | 56.0 |
| d | 4.294967315E9 |
| e | 14.0 |
| null | 1065555.0 |
+-------+----------------+
6 rows selected (0.227 seconds)
{noformat}
{noformat}
postgres=# select c2, AVG(SUM(c1)) OVER(partition by c2 order by c2 nulls first) FROM t222 group by c2;
c2 | avg
----+------------------------
| 1065555.000000000000
a | 11152.0000000000000000
b | 41.0000000000000000
c | 56.0000000000000000
d | 4294967315.00000000
e | 14.0000000000000000
(6 rows)
{noformat}
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