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Posted to dev@hive.apache.org by "Chaoyu Tang (JIRA)" <ji...@apache.org> on 2016/07/19 15:43:20 UTC

[jira] [Created] (HIVE-14281) Issue in decimal multiplication

Chaoyu Tang created HIVE-14281:
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             Summary: Issue in decimal multiplication
                 Key: HIVE-14281
                 URL: https://issues.apache.org/jira/browse/HIVE-14281
             Project: Hive
          Issue Type: Bug
          Components: Types
            Reporter: Chaoyu Tang
            Assignee: Chaoyu Tang


{code}
CREATE TABLE test (a DECIMAL(38,18), b DECIMAL(38,18));
INSERT OVERWRITE TABLE test VALUES (20, 20);
SELECT a*b from test
{code}
The returned result is NULL (instead of 400)
It is because Hive adds the scales from operands and the type for a*b is set to decimal (38, 36). Hive could not handle this case properly (e.g. by rounding)



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