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https://issues.apache.org/jira/browse/PIG-2726?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13294806#comment-13294806
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Prasanth J commented on PIG-2726:
---------------------------------
This patch converts null values in dimensions to "unknown" and uses actual null
value for rollup. For a sample input
red, ,12
CUBE operator will now generate
red,unknown,12
,unknown,12
red, ,12
, ,12
Please let me know if it is ok to go ahead with null for rollup? another
alternative would be to use "*" or "all" to represent rollup value.
> Handling legitimate NULL values
> -------------------------------
>
> Key: PIG-2726
> URL: https://issues.apache.org/jira/browse/PIG-2726
> Project: Pig
> Issue Type: Sub-task
> Affects Versions: 0.11
> Reporter: Prasanth J
> Assignee: Prasanth J
> Attachments: PIG-2726.1.patch
>
>
> Look into SQL/Oracle server for how they are handling legitimate NULL values
> in the input while performing operations like roll-up, filtering etc. Current
> implementation outputs NULL string which should be replaced by actual null
> value.
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