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https://issues.apache.org/jira/browse/KYLIN-3001?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dong Li resolved KYLIN-3001.
----------------------------
Resolution: Fixed
Fix Version/s: v2.3.0
merged to master branch
https://github.com/apache/kylin/commit/c9bcc5b88475adef6cbd74f149128702997c776b
> Cache key issue
> ----------------
>
> Key: KYLIN-3001
> URL: https://issues.apache.org/jira/browse/KYLIN-3001
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: v2.1.0
> Reporter: Pan, Julian
> Assignee: liyang
> Fix For: v2.3.0
>
> Attachments: KYLIN_3001_Cache_key_issue.patch
>
>
> Currently the cacheKey generate by SQLRequest getCacheKey:
> cacheKey = Lists.newArrayList(sql.replaceAll("\\s+", ""), project, offset,
> limit, acceptPartial,
> backdoorToggles);
> Which will remove all the space and break line.
> If I have a sql:
> select a, sum(c) from table
> --where a > 0 group by a;
> and another sql:
> select a, sum(c) from table
> --where a > 0
> group by a;
> The two sql will share same cache key.
> But the first sql should be break. If you query second sql, and then query
> the first again. It will return result.
> And another issue is if remove all space, which will mix a as b and aasb.
> I think the better way is just replace multiple space to one space
> Should I create a patch? Or just provide the fix:
> cacheKey = Lists.newArrayList(sql.replaceAll("[ ]", " "), project, offset,
> limit, acceptPartial,
> backdoorToggles);
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