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https://issues.apache.org/jira/browse/HIVE-655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12779173#action_12779173
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Paul Yang commented on HIVE-655:
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No, I don't think that will be supported - only SELECT UDTF(col0) as colName...
previousRow & previousTag aren't needed if the only object that should be send
to Operator.forward() is the output of the UDTF. It was needed for supporting
SELECT pageid, explode(adid_list).... but I left it in there as I thought it
might be useful for implementing LATERAL VIEW later.
> Add support for user defined table generating functions
> -------------------------------------------------------
>
> Key: HIVE-655
> URL: https://issues.apache.org/jira/browse/HIVE-655
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Raghotham Murthy
> Assignee: Paul Yang
> Attachments: HIVE-655.1.patch, HIVE-655.2.patch, HIVE-655.3.patch
>
>
> Provide a way for users to add a table generating function, i.e., functions
> that generate multiple rows from a single input row. Currently, the only way
> to do it is via the TRANSFORM clause which requires streaming the data.
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