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https://issues.apache.org/jira/browse/PIG-875?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12733403#action_12733403
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Olga Natkovich commented on PIG-875:
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I don't think we want to define at runtime whether UDF needs to count nulls
since it complicates and slows the code.
I don't think there is a precedent of AVG counting NULLs and so I don't feel we
need to support it. Otherwise, why not do the same for SUM, MIN, and MAX. If
users want to do that, they can implement their own UDFs but I don't feel we
need to support this by default.
I can change the name of the function if it makes it more intuitive. It just
seems a bit long.
> Making COUNT and AVG semantics SQL compliant
> --------------------------------------------
>
> Key: PIG-875
> URL: https://issues.apache.org/jira/browse/PIG-875
> Project: Pig
> Issue Type: Bug
> Reporter: Olga Natkovich
> Assignee: Olga Natkovich
> Fix For: 0.4.0
>
>
> Currently both AVG and COUNT counts NULLs
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