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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