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https://issues.apache.org/jira/browse/KYLIN-4464?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17136413#comment-17136413
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ASF GitHub Bot commented on KYLIN-4464:
---------------------------------------
RupengWang edited a comment on pull request #1198:
URL: https://github.com/apache/kylin/pull/1198#issuecomment-644599963
## Design test cases
### Prepare test env
- create cube and build segment (2012-01-01 ~ 2015-01-01)
- make sure the sql like "Query ... row_number over(order by c1) ... order
by c2"
- compare
### Case-1
```sql
select t.*, row_number() over (order by t.lstg_format_name) as row_num from (
select lstg_format_name, sum(price) as GMV from
KYLIN_SALES
where lstg_format_name is not null
group by lstg_format_name
) as t
order by t.GMV desc limit 5;
```
1. Get Kylin result
2. Get Hive result
### Case-2
```sql
```
1. Get Kylin result
2. Get Hive result
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> Query ... row_number over(order by c1) ... order by c2 ... get wrong order
> result
> ---------------------------------------------------------------------------------
>
> Key: KYLIN-4464
> URL: https://issues.apache.org/jira/browse/KYLIN-4464
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Reporter: Chao Long
> Assignee: Chao Long
> Priority: Major
> Fix For: v3.1.0, v3.0.2
>
> Attachments: image-2020-04-20-18-19-40-925.png,
> image-2020-04-20-18-22-34-765.png, image-2020-05-07-10-32-39-983.png
>
>
> *SQL*
> {code:java}
> select t.*, row_number() over (order by t.lstg_format_name) as row_num from (
> select lstg_format_name, sum(price) as GMV from
> KYLIN_SALES
> where lstg_format_name is not null
> group by lstg_format_name
> ) as t
> order by t.GMV desc limit 5{quote}
> {code}
>
> *Kylin result (order by lstg_format_name)*
> !image-2020-04-20-18-19-40-925.png!
>
> *Calcite execution plan*
> {code:java}
> EXECUTION PLAN BEFORE REWRITE
> OLAPToEnumerableConverter
> OLAPWindowRel(window#0=[window(partition {} order by [0 DESC] rows between
> UNBOUNDED PRECEDING and CURRENT ROW aggs [ROW_NUMBER()])], ctx=[],
> groups=[[window(partition {} order by [0 DESC] rows between UNBOUNDED
> PRECEDING and CURRENT ROW aggs [ROW_NUMBER()])]])
> OLAPLimitRel(ctx=[], fetch=[50000])
> OLAPSortRel(sort0=[$1], dir0=[DESC], ctx=[])
> OLAPAggregateRel(group=[{0}], GMV=[SUM($1)], ctx=[])
> OLAPProjectRel(LSTG_FORMAT_NAME=[$2], PRICE=[$5], ctx=[])
> OLAPFilterRel(condition=[IS NOT NULL($2)], ctx=[])
> OLAPTableScan(table=[[DEFAULT, KYLIN_SALES]], ctx=[],
> fields=[[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]])
> {code}
>
> *Hive result(order by GMV)*
> !image-2020-04-20-18-22-34-765.png!
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