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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-13963) vectorization - string arguments may be converted to decimal null
Date Tue, 07 Jun 2016 19:29:21 GMT
Sergey Shelukhin created HIVE-13963:
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             Summary: vectorization - string arguments may be converted to decimal null
                 Key: HIVE-13963
                 URL: https://issues.apache.org/jira/browse/HIVE-13963
             Project: Hive
          Issue Type: Bug
            Reporter: Sergey Shelukhin
            Assignee: Matt McCline
            Priority: Critical


See HIVE-13957.
The default precision and scale for the implicit decimal cast are max,max, ie 38,38. Those
don't do what the code may assume they do. All the values > 0 become invalid and precision-scale
enforcement automatically converts them to null.

We need to 
1) Validate when this happens in/after the conversion code and bail;
2) Or, derive precision and scale from the constants themselves so they all fit, instead;
3) Or, derive it from the type of whatever caused the conversion in the first place (e.g.
IN column decimal); however, this could be function-specific (e.g. IN just needs equality,
BETWEEN would need at least one extra digit, arithmetic, if this ever happens, would need
everything, etc.);
4) Something else? :)




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