Victoria Markman created DRILL-3651:
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Summary: Window function should not be allowed in order by clause
of over clause of window function
Key: DRILL-3651
URL: https://issues.apache.org/jira/browse/DRILL-3651
Project: Apache Drill
Issue Type: Bug
Components: Query Planning & Optimization
Reporter: Victoria Markman
Assignee: Jinfeng Ni
Priority: Minor
Should not parse and throw an error according to SQL standard.
"ISO/IEC 9075-2:2011(E) 7.11 <window clause>"
d) If WDX has a window ordering clause, then WDEF shall not specify <window
order clause> (hope I'm reading it correctly)
{code}
SELECT rank() OVER (ORDER BY rank() OVER (ORDER BY c1)) from t1;
{code}
Instead, drill returns result:
{code}
0: jdbc:drill:schema=dfs> SELECT rank() OVER (ORDER BY rank() OVER (ORDER BY
c1)) from t1;
+---------+
| EXPR$0 |
+---------+
| 1 |
| 2 |
| 3 |
| 4 |
| 5 |
| 6 |
| 7 |
| 8 |
| 9 |
| 10 |
+---------+
10 rows selected (0.336 seconds)
{code}
Postgres throws an error in this case:
{code}
postgres=# SELECT rank() OVER (ORDER BY rank() OVER (ORDER BY c1)) from t1;
ERROR: window functions are not allowed in window definitions
LINE 1: SELECT rank() OVER (ORDER BY rank() OVER (ORDER BY c1)) from...
{code}
Courtesy of postgres test suite.
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