Mu Kong created KYLIN-2841:
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Summary: 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
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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