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From "Eric Hanson (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-5762) Implement vectorized support for the DECIMAL data type
Date Wed, 06 Nov 2013 18:28:17 GMT
Eric Hanson created HIVE-5762:
---------------------------------

             Summary: Implement vectorized support for the DECIMAL data type
                 Key: HIVE-5762
                 URL: https://issues.apache.org/jira/browse/HIVE-5762
             Project: Hive
          Issue Type: Sub-task
            Reporter: Eric Hanson


Add support to allow queries referencing DECIMAL columns and expression results to run efficiently
in vectorized mode.  Include unit tests and end-to-end tests. 

Before starting or at least going very far, please write design specification (a new section
for the design spec attached to HIVE-4160) for how support for the different DECIMAL types
should work in vectorized mode, and the roadmap, and have it reviewed. 

It may be feasible to re-use LongColumnVector and related VectorExpression classes for fixed-point
decimal in certain data ranges. That should be at least considered to get faster performance
and save code. For unlimited precision DECIMAL, a new column vector subtype may be needed,
or a BytesColumnVector could be re-used.





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