Aihua Xu created HIVE-13423:
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Summary: Change the precison/scale for intermediate sum result for
decimal datatype
Key: HIVE-13423
URL: https://issues.apache.org/jira/browse/HIVE-13423
Project: Hive
Issue Type: Bug
Components: Query Processor
Affects Versions: 2.0.0
Reporter: Aihua Xu
Assignee: Aihua Xu
When we handle sum over decimal datatype, e.g., in a groupby statement, it will
possibly yield overflow if we use original data type.
We need to change precision/scale for sum() result or give an error/warning if
such change is not possible.
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