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https://issues.apache.org/jira/browse/HIVE-655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12733422#action_12733422
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Raghotham Murthy commented on HIVE-655:
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The problem with doing it the oracle way is that we need to find another way to
specify the input (or FROM clause) for the TRANSFORM/UDTF itself. So, seems
like its better to specify table function in the SELECT and use that as a
subquery in the FROM clause.
> 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: Raghotham Murthy
>
> 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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