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Posted to issues@kylin.apache.org by "Zhong Yanghong (Jira)" <ji...@apache.org> on 2019/12/06 09:04:00 UTC

[jira] [Created] (KYLIN-4281) Precisely set the data type of tuple expression

Zhong Yanghong created KYLIN-4281:
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             Summary: Precisely set the data type of tuple expression
                 Key: KYLIN-4281
                 URL: https://issues.apache.org/jira/browse/KYLIN-4281
             Project: Kylin
          Issue Type: Improvement
            Reporter: Zhong Yanghong
            Assignee: Zhong Yanghong


Previously to simplify the calculating of sum(case when), all of the binary calculation is based on BigDecimal, which is not good for all, especially when dealing with count(distinct case when), whose inner data type may be hll or bitmap.



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