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From "Zheng Shao (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HIVE-362) avg() ignores null values; consider variant that doesn't
Date Tue, 14 Apr 2009 05:25:14 GMT

     [ https://issues.apache.org/jira/browse/HIVE-362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Zheng Shao resolved HIVE-362.

    Resolution: Won't Fix

> avg() ignores null values; consider variant that doesn't
> --------------------------------------------------------
>                 Key: HIVE-362
>                 URL: https://issues.apache.org/jira/browse/HIVE-362
>             Project: Hadoop Hive
>          Issue Type: Bug
>          Components: Query Processor
>            Reporter: Adam Kramer
> Some of the current aggregates (sum, avg) have a fairly standard behavior: If any item
in the list is NULL, the sum, average, etc., cannot be computed. And so, NULL is returned.
> 1) If this is the case, the query should return much faster--see a null, return NULL,
> 2) It would be nice to have versions or ways to use these functions with NULL data--specifically,
to treat the NULL as zero or to ignore the NULL and return the results for non-NULL data.
> This also would apply to the variance functions referenced in https://issues.apache.org/jira/browse/HIVE-165

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