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Posted to issues@drill.apache.org by "Victoria Markman (JIRA)" <ji...@apache.org> on 2015/06/19 19:42:00 UTC
[jira] [Created] (DRILL-3325) Explicitly specified default window
frame throws an error requiring order by
Victoria Markman created DRILL-3325:
---------------------------------------
Summary: Explicitly specified default window frame throws an error requiring order by
Key: DRILL-3325
URL: https://issues.apache.org/jira/browse/DRILL-3325
Project: Apache Drill
Issue Type: Bug
Components: Query Planning & Optimization
Affects Versions: 1.0.0
Reporter: Victoria Markman
Assignee: Jinfeng Ni
Calcite requires explicit ORDER BY clause when "default" frame ("UNBOUNDED PRECEDING AND CURRENT ROW") is specified:
{code}
0: jdbc:drill:schema=dfs> select sum(a1) over(partition by b1 range between unbounded preceding and unbounded following ) from t1;
Error: PARSE ERROR: From line 1, column 20 to line 1, column 95: Window specification must contain an ORDER BY clause
[Error Id: 446c7fd3-f588-4832-b79d-08cec610ff24 on atsqa4-133.qa.lab:31010] (state=,code=0)
{code}
I thought that we decided to make query above to be equivalent to:
{code}
0: jdbc:drill:schema=dfs> explain plan for select sum(a1) over(partition by b1) from t1;
{code}
Explain plan (notice frame and an empty "order by"):
{code}
| 00-00 Screen
00-01 Project(EXPR$0=[CASE(>($2, 0), CAST($3):ANY, null)])
00-02 Window(window#0=[window(partition {1} order by [] range between UNBOUNDED PRECEDING and UNBOUNDED FOLLOWING aggs [COUNT($0), $SUM0($0)])])
00-03 SelectionVectorRemover
00-04 Sort(sort0=[$1], dir0=[ASC])
00-05 Project(a1=[$1], b1=[$0])
00-06 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///drill/testdata/subqueries/t1]], selectionRoot=/drill/testdata/subqueries/t1, numFiles=1, columns=[`a1`, `b1`]]])
{code}
If I add order by, I get an error. Because based on our design, see DRILL-3188, order by only allows frames: "RANGE UNBOUNDED PRECEDING" and "RANGE BETEWEEN UNBOUNDED PRECEDING AND CURRENT ROW"
{code}
0: jdbc:drill:schema=dfs> select sum(a1) over(partition by b1 order by c1 range between unbounded preceding and unbounded following ) from t1;
Error: UNSUPPORTED_OPERATION ERROR: This type of window frame is currently not supported
See Apache Drill JIRA: DRILL-3188
[Error Id: 7b2f1e39-0ad2-4584-aa4c-bdace84adfe4 on atsqa4-133.qa.lab:31010] (state=,code=0)
{code}
"{color:red}ROWS{color} BETWEEN UNBOUNDED PRECEDING AND UNBOUNDED FOLLOWING" works:
{code}
0: jdbc:drill:schema=dfs> select sum(a1) over(partition by b1 rows between unbounded preceding and unbounded following ) from t1;
+---------+
| EXPR$0 |
+---------+
| 1 |
| 2 |
| 3 |
| 5 |
| 6 |
| 7 |
| null |
| 9 |
| 10 |
| 4 |
+---------+
10 rows selected (0.312 seconds)
{code}
explain plan: notice empty "order by" as well.
{code}
00-01 Project(EXPR$0=[CASE(>($2, 0), CAST($3):ANY, null)])
00-02 Window(window#0=[window(partition {1} order by [] rows between UNBOUNDED PRECEDING and UNBOUNDED FOLLOWING aggs [COUNT($0), $SUM0($0)])])
00-03 SelectionVectorRemover
00-04 Sort(sort0=[$1], dir0=[ASC])
00-05 Project(a1=[$1], b1=[$0])
00-06 Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=maprfs:///drill/testdata/subqueries/t1]], selectionRoot=/drill/testdata/subqueries/t1, numFiles=1, columns=[`a1`, `b1`]]])
{code}
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