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https://issues.apache.org/jira/browse/FLINK-19371?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17327635#comment-17327635
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Flink Jira Bot commented on FLINK-19371:
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This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> Support table transforming functions in SQL
> -------------------------------------------
>
> Key: FLINK-19371
> URL: https://issues.apache.org/jira/browse/FLINK-19371
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API
> Reporter: Timo Walther
> Priority: Major
> Labels: stale-major
>
> This is an umbrella issue for the general problem of having a
> `ProcessFunction`-like functionality in SQL. Ideally, such an operator would
> be flexible enough to take and transform entire tables, might be stateful,
> and can work with event-time.
> Oracle provides the concept of Polymorphic Table Function (PTF)
> [[1]|https://oracle-base.com/articles/18c/polymorphic-table-functions-18c]
> [[2]|https://www.doag.org/formes/pubfiles/11270472/2019-SQL-Andrej_Pashchenko-Polymorphic_Table_Functions_in_18c_Einfuehrung_und_Beispiele-Praesentation.pdf]
> which could help to solve this problem.
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