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From "Khurram Faraaz (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-4463) Frame clause in window definition without PARTITION BY and ORDER BY results in validation error
Date Wed, 02 Mar 2016 11:04:18 GMT
Khurram Faraaz created DRILL-4463:
-------------------------------------

             Summary: Frame clause in window definition without PARTITION BY and ORDER BY
results in validation error
                 Key: DRILL-4463
                 URL: https://issues.apache.org/jira/browse/DRILL-4463
             Project: Apache Drill
          Issue Type: Bug
          Components: Execution - Flow
    Affects Versions: 1.6.0
         Environment: 4 node cluster
            Reporter: Khurram Faraaz


Use of frame clause in window definition without PARTITION BY and ORDER BY results in validation
error, this should be supported as per SQL spec.

Drill 1.6.0, commit ID : 6d5f4983, CentOS

{noformat}
0: jdbc:drill:schema=dfs.tmp> SELECT LAST_VALUE(c1) OVER(RANGE BETWEEN UNBOUNDED PRECEDING
AND UNBOUNDED FOLLOWING) FROM `t_alltype`;
Error: VALIDATION ERROR: From line 1, column 27 to line 1, column 85: Window specification
must contain an ORDER BY clause


[Error Id: 4ff9916f-f122-46ae-81f1-8cd1d90fa331 on centos-02.qa.lab:31010] (state=,code=0)
{noformat}

Same query as above with an EMPTY window definition returns results. Note that there is no
ORDER BY clause in the below query. Error message in the above query says "Window specification
must contain an ORDER BY clause", which is not correct.

{noformat}
0: jdbc:drill:schema=dfs.tmp> SELECT LAST_VALUE(c1) OVER( ) FROM `t_alltype`;
+---------+
| EXPR$0  |
+---------+
| 145     |
| 145     |
| 145     |
| 145     |
| 145     |
| 145     |
| 145     |
| 145     |
...
| 145    |
| 145    |
| 145    |
| 145    |
| 145    |
| 145    |
| 145    |
| 145    |
+--------+
145 rows selected (0.249 seconds)
{noformat}

Postgres returns results for the query that uses frame clause within window definition, without
an ORDER BY clause.

{noformat}
postgres=# SELECT LAST_VALUE(c1) OVER(RANGE BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING)
FROM t_alltype;;
 last_value
------------
        145
        145
        145
        145
        145
        145
        145
...
 145
        145
        145
        145
        145
(145 rows)
{noformat}

Also another point to note, a similar window function query with a different frame clause,
works and Drill returns results.

{noformat}
0: jdbc:drill:schema=dfs.tmp> SELECT LAST_VALUE(c1) OVER(ROWS BETWEEN UNBOUNDED PRECEDING
AND CURRENT ROW) FROM `t_alltype`;
+---------+
| EXPR$0  |
+---------+
| 1       |
| 2       |
| 3       |
| 4       |
| 5       |
| 6       |
| 7       |
| 8       |
| 9       |
| 10      |
| 11      |
| 12      |
| 13      |
| 14      |
| 15      |
| 16      |
| 17      |
| 18      |
...
| 140    |
| 141    |
| 142    |
| 143    |
| 144    |
| 145    |
+--------+
145 rows selected (0.254 seconds)
{noformat}



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