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Posted to issues@drill.apache.org by "Sean Hsuan-Yi Chu (JIRA)" <ji...@apache.org> on 2015/08/12 02:59:46 UTC
[jira] [Commented] (DRILL-3580) wrong plan for window function
queries containing function(col1 + colb)
[ https://issues.apache.org/jira/browse/DRILL-3580?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14692689#comment-14692689 ]
Sean Hsuan-Yi Chu commented on DRILL-3580:
------------------------------------------
A similar issue can be reproduced in Calcite here:
https://issues.apache.org/jira/browse/CALCITE-841
> wrong plan for window function queries containing function(col1 + colb)
> -----------------------------------------------------------------------
>
> Key: DRILL-3580
> URL: https://issues.apache.org/jira/browse/DRILL-3580
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.1.0
> Reporter: Deneche A. Hakim
> Assignee: Sean Hsuan-Yi Chu
> Priority: Critical
> Labels: window_function
> Fix For: 1.2.0
>
>
> The following query has a wrong plan:
> {noformat}
> explain plan for select position_id, salary, sum(salary) over (partition by position_id), sum(position_id + salary) over (partition by position_id) from cp.`employee.json` limit 20;
> +------+------+
> | text | json |
> +------+------+
> | 00-00 Screen
> 00-01 ProjectAllowDup(position_id=[$0], salary=[$1], EXPR$2=[$2], EXPR$3=[$3])
> 00-02 SelectionVectorRemover
> 00-03 Limit(fetch=[20])
> 00-04 Project(position_id=[$0], salary=[$1], w0$o0=[$2], w0$o00=[$4])
> 00-05 Window(window#0=[window(partition {0} order by [] range between UNBOUNDED PRECEDING and UNBOUNDED FOLLOWING aggs [SUM($3)])])
> 00-06 Project(position_id=[$1], salary=[$2], w0$o0=[$3], $3=[+($1, $2)])
> 00-07 Window(window#0=[window(partition {1} order by [] range between UNBOUNDED PRECEDING and UNBOUNDED FOLLOWING aggs [SUM($2)])])
> 00-08 SelectionVectorRemover
> 00-09 Sort(sort0=[$1], dir0=[ASC])
> 00-10 Project(T13¦¦*=[$0], position_id=[$1], salary=[$2])
> 00-11 Scan(groupscan=[EasyGroupScan [selectionRoot=classpath:/employee.json, numFiles=1, columns=[`*`], files=[classpath:/employee.json]]])
> {noformat}
> The plan contains 2 window operators which shouldn't be possible according to DRILL-3196.
> The results are also incorrect.
> Depending on which aggregation or window function used we get wrong results or an IndexOutOfBounds exception
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