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Posted to dev@hive.apache.org by "Alexander Pivovarov (JIRA)" <ji...@apache.org> on 2015/03/04 20:40:38 UTC

[jira] [Created] (HIVE-9858) Create cbrt (cube root) UDF

Alexander Pivovarov created HIVE-9858:
-----------------------------------------

             Summary: Create cbrt (cube root) UDF
                 Key: HIVE-9858
                 URL: https://issues.apache.org/jira/browse/HIVE-9858
             Project: Hive
          Issue Type: Improvement
            Reporter: Alexander Pivovarov


returns the cube root of a double value
cbrt(double a) : double

For example:
{code}
select cbrt(87860583272930481.0);
OK
444561.0
{code}

I noticed that Math.pow(a, 1.0/3.0) and hive power UDF return 444560.99999999965 for the example above.
However Math.cbrt returns 444561.0
This is why we should have hive cbrt function in hive



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