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Posted to dev@kylin.apache.org by "hongbin ma (JIRA)" <ji...@apache.org> on 2017/11/01 13:17:00 UTC

[jira] [Created] (KYLIN-2982) Avoid upgrade column in OLAPTable

hongbin ma created KYLIN-2982:
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             Summary: Avoid upgrade column in OLAPTable
                 Key: KYLIN-2982
                 URL: https://issues.apache.org/jira/browse/KYLIN-2982
             Project: Kylin
          Issue Type: Improvement
            Reporter: hongbin ma
            Priority: Normal


before CALCITE-845, to avoid sum(integer_typed_col) to overflow, we worked around by upgrading all integer columns (which appearing in sum measure ) to bigint type. The workaround will change the column's type without notifying users, and will easily lead to code mess. 

Now that CALCITE-845 is ready, we can use that to provide a cleaner impl



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