hongbin ma created KYLIN-1345:
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Summary: measure type expansion when dealing sum of decimal metric
Key: KYLIN-1345
URL: https://issues.apache.org/jira/browse/KYLIN-1345
Project: Kylin
Issue Type: Improvement
Reporter: hongbin ma
Assignee: hongbin ma
suppose a metric column price is of type decimal (6,2), the sum aggregator of
it might exceed the maximal of decimal (6,2). Currently for metric aggregators
we inherite the column's type in hive. We should think auto expanding decimal
type to decimal(18,4) (just an example) for such cases
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