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From "Deneche A. Hakim (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Deleted] (DRILL-3196) Disable multiple partition by clauses in the same sql query
Date Thu, 28 May 2015 20:31:25 GMT

     [ https://issues.apache.org/jira/browse/DRILL-3196?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Deneche A. Hakim updated DRILL-3196:
------------------------------------
    Comment: was deleted

(was: I think this is correct. Looking at the plan the first window {{over(partition by a2
order by a2)}} has this range {{range between UNBOUNDED PRECEDING and CURRENT ROW}} and this
is the definition of the default frame, which is correct because the query doesn't contain
a frame clause.
The second window {{over(partition by a2,b2,c2)}} has {{range between UNBOUNDED PRECEDING
and UNBOUNDED FOLLOWING}}, which means each frame will include all rows of the partition and
this is also correct because the order by clause is not present.

Someone with a better knowledge of Drill Plan should definitely take a second look at the
plan though)

> Disable multiple partition by clauses in the same sql query
> -----------------------------------------------------------
>
>                 Key: DRILL-3196
>                 URL: https://issues.apache.org/jira/browse/DRILL-3196
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>    Affects Versions: 1.0.0
>            Reporter: Victoria Markman
>            Assignee: Sean Hsuan-Yi Chu
>            Priority: Critical
>              Labels: window_function
>
> Currently these queries parse and execute, but plan does not look correct.
> {code}
> 0: jdbc:drill:schema=dfs> explain plan for  select sum(a2) over(partition by a2 order
by a2), count(*) over(partition by a2,b2,c2)  from t2 order by 1,2; 
> +------+------+
> | text | json |
> +------+------+
> | 00-00    Screen
> 00-01      Project(EXPR$0=[$0], EXPR$1=[$1])
> 00-02        SelectionVectorRemover
> 00-03          Sort(sort0=[$0], sort1=[$1], dir0=[ASC], dir1=[ASC])
> 00-04            Project(EXPR$0=[CASE(>($3, 0), CAST($4):ANY, null)], EXPR$1=[$5])
> 00-05              Window(window#0=[window(partition {0, 1, 2} order by [] range between
UNBOUNDED PRECEDING and UNBOUNDED FOLLOWING aggs [COUNT()])])
> 00-06                SelectionVectorRemover
> 00-07                  Sort(sort0=[$0], sort1=[$1], sort2=[$2], dir0=[ASC], dir1=[ASC],
dir2=[ASC])
> 00-08                    Window(window#0=[window(partition {0} order by [0] range between
UNBOUNDED PRECEDING and CURRENT ROW aggs [COUNT($0), $SUM0($0)])])
> 00-09                      SelectionVectorRemover
> 00-10                        Sort(sort0=[$0], sort1=[$0], dir0=[ASC], dir1=[ASC])
> 00-11                          Project(a2=[$1], b2=[$0], c2=[$2])
> 00-12                            Scan(groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath
[path=maprfs:///drill/testdata/aggregation/t2]], selectionRoot=/drill/testdata/aggregation/t2,
numFiles=1, columns=[`a2`, `b2`, `c2`]]])
> {code}



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