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https://issues.apache.org/jira/browse/DRILL-3327?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14595162#comment-14595162
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Aman Sinha commented on DRILL-3327:
-----------------------------------
This appears to be a bug in the computation of a window partition when the Sort
below spill to disk and a single partition ends up spanning multiple batches.
The partition gets reset and the row number value starts all over again. I
suspect this would be an issue with other window functions also, not just
row_number. I will look some more.
> row_number function returns incorrect result when only order by clause is
> specified
> -----------------------------------------------------------------------------------
>
> Key: DRILL-3327
> URL: https://issues.apache.org/jira/browse/DRILL-3327
> Project: Apache Drill
> Issue Type: Bug
> Components: Query Planning & Optimization
> Affects Versions: 1.0.0
> Reporter: Victoria Markman
> Assignee: Aman Sinha
> Priority: Critical
> Labels: window_function
> Attachments: j1.tar, row_number_wrong_result.tar
>
>
> Queries returning wrong result:
> {code}
> select c_integer, row_number() over(order by c_integer) from j1 order by 2;
> select c_integer, row_number() over(order by c_integer) from j1 order by 2
> desc;
> select c_integer, row_number() over(order by c_integer desc) from j1 order by
> 2;
> select c_integer, row_number() over(order by c_integer desc) from j1 order by
> 2;
> select c_integer, row_number() over(order by c_integer nulls first) from j1
> order by c_integer nulls last, row_number() over(order by c_integer nulls
> first);
> select c_integer, row_number() over(order by c_integer nulls last) from j1
> order by c_integer nulls first, row_number() over(order by c_integer nulls
> last);
> {code}
> In attached tar file (row_number_wrong_result.tar) you will find:
> 1. *.sql - file that contains query
> 2. *.res - expected result (generated from Postgres)
> 3. *.out - result returned by drill
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