hongbin ma created KYLIN-2152:
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Summary: TopN group by column does not distinguish between NULL
and ""
Key: KYLIN-2152
URL: https://issues.apache.org/jira/browse/KYLIN-2152
Project: Kylin
Issue Type: Bug
Reporter: hongbin ma
Assignee: Shaofeng SHI-- This message was sent by Atlassian JIRA (v6.3.4#6332)
