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https://issues.apache.org/jira/browse/KYLIN-2841?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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XiaoXiang Yu updated KYLIN-2841:
--------------------------------
Attachment: kylin-2841-2.txt
kylin-2841-1.txt
> LIMIT is buggy with subquery
> ----------------------------
>
> Key: KYLIN-2841
> URL: https://issues.apache.org/jira/browse/KYLIN-2841
> Project: Kylin
> Issue Type: Bug
> Affects Versions: v2.1.0
> Reporter: Mu Kong
> Assignee: zhengdong
> Priority: Major
> Labels: scope
> Fix For: v2.6.0
>
> Attachments: 0001-KYLIN-2841-LIMIT-is-buggy-with-subquery.patch,
> image-2018-12-13-23-41-53-732.png, image-2018-12-13-23-45-06-271.png,
> kylin-2841-1.txt, kylin-2841-2.txt
>
>
> Hi, all.
> I found that limit in the web UI seems not behaving as expected.
> When I run a query like the follows:
> {code:sql}
> SELECT
> SUM(col3) AS col4,
> SUM(col5) AS total_col5,
> col1
> FROM
> (
> SELECT
> col1,
> col2,
> MAX(col3) AS col3,
> COUNT(*) AS col5
> FROM db.table
> WHERE col6 = 'somestring'
> GROUP BY col1, col2
> )
> GROUP BY col1
> {code}
> When I specify the limit as 50, the result has 19 records, and when I specify
> the limit as 500000, there are 90+ records in the result and each record has
> higher col4 and total_col5.
> But for query that doesn't have subquery, the result remains the same no
> matter how I change the limit.
> I guess for the query with subquery, limit somehow limits the number of the
> result from the inner query instead of the result of the outer query.
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