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https://issues.apache.org/jira/browse/KYLIN-4011?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17048540#comment-17048540
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Roberto Tardío Olmos commented on KYLIN-4011:
---------------------------------------------
Hi,
In my case it does not work when I intorduce a join in order to use columns
from dimensions tables and not from fact table.
For example;
The following query works well:
SELECT
part_dt,
lstg_format_name,
grouping(part_dt)+grouping(lstg_format_name) as lochierarchy,
SUM(price),
RANK() OVER(
PARTITION BY grouping(part_dt)+grouping(lstg_format_name),
case when grouping(lstg_format_name) = 0 then part_dt end
ORDER BY SUM(price) asc) AS rank_within_parent
FROM kylin_sales
GROUP BY
grouping sets((part_dt, lstg_format_name))
ORDER BY
lochierarchy desc,
case when lochierarchy = 0 then part_dt end,
rank_within_parent ;
However, if I introduce just a join with any dimension table, the query returns
the following error:
*RowType=19, ColumnRowType=17* while executing SQL: "SELECT part_dt,
lstg_format_name, grouping(part_dt)+grouping(lstg_format_name) as lochierarchy,
SUM(price), RANK() OVER( PARTITION BY
grouping(part_dt)+grouping(lstg_format_name), case when
grouping(lstg_format_name) = 0 then part_dt end ORDER BY SUM(price) asc) AS
rank_within_parent FROM kylin_sales JOIN KYLIN_CAL_DT on part_dt = cal_dt GROUP
BY grouping sets((part_dt, lstg_format_name)) ORDER BY lochierarchy desc, case
when lochierarchy = 0 then part_dt end, rank_within_parent LIMIT 50000"
The query executed (in bold the join added)
SELECT
part_dt,
lstg_format_name,
grouping(part_dt)+grouping(lstg_format_name) as lochierarchy,
SUM(price),
RANK() OVER(
PARTITION BY grouping(part_dt)+grouping(lstg_format_name),
case when grouping(lstg_format_name) = 0 then part_dt end
ORDER BY SUM(price) asc) AS rank_within_parent
FROM kylin_sales
*JOIN KYLIN_CAL_DT on part_dt = cal_dt*
GROUP BY
grouping sets((part_dt, lstg_format_name))
ORDER BY
lochierarchy desc,
case when lochierarchy = 0 then part_dt end,
rank_within_parent ;
Regards!
Roberto
> Kyling grouping function
> ------------------------
>
> Key: KYLIN-4011
> URL: https://issues.apache.org/jira/browse/KYLIN-4011
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: v2.6.2
> Reporter: tag
> Assignee: Yaqian Zhang
> Priority: Major
> Attachments: image-2019-11-05-18-04-46-639.png
>
>
> {{```}}
> {{select dim1, case grouping(dim2) when 1 then 'ALL' else dim2 end, sum(col)
> as metric1 from table group by grouping sets((dim1, dim2), (dim1));}}
> {{```}}
> {{`case grouping(dim2) when 2 then 'All' else dim2 end` can work in version
> v2.5.2, but invalid in version v2.6.2. }}
> {{How to query aggregate by grouping sets?}}
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