Yifei Wu created KYLIN-3392:
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Summary: support NULL value in Sum, Max, Min Aggregation
Key: KYLIN-3392
URL: https://issues.apache.org/jira/browse/KYLIN-3392
Project: Kylin
Issue Type: Bug
Reporter: Yifei Wu
Assignee: Yifei Wu
It is treated as 0 when confronted with NULL value in KYLIN's basic aggregate
measure (like sum, max, min). However, to distinguish the NULL value with 0 is
very necessary.
It should be like this
*sum(null, null) = null*
*sum(null, 1) = 1*
*max(null, null) = null*
*max(null, -1) = -1*
*min(null, -1）= -1*
in accordance with Hive and SparkSQL
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