Timo Walther created FLINK-19371:
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Summary: Support table transformations 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
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]
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