[jira] [Assigned] (FLINK-20506) Support FlatMap Operation in Python Table API

["Dian Fu (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-20506?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Dian Fu reassigned FLINK-20506:
-------------------------------

    Assignee: Huang Xingbo  (was: Dian Fu)

> Support FlatMap Operation in Python Table API
> ---------------------------------------------
>
>                 Key: FLINK-20506
>                 URL: https://issues.apache.org/jira/browse/FLINK-20506
>             Project: Flink
>          Issue Type: Sub-task
>          Components: API / Python
>            Reporter: Huang Xingbo
>            Assignee: Huang Xingbo
>            Priority: Major
>             Fix For: 1.13.0
>
>
> Support Python UDTF for FlatMap Operation in Python Table API
> The usage:
> {code:java}
> t = ...  # type: Table, table schema: [a: String, b: Int, c: Int]
> # flat_map Python UDTF
> flat_map_func = udtf(lambda x: for i in range(x): yield Row(i + 1, i * i), 
>            result_types=[DataTypes.INT(), DataTypes.INT()]
> t.flat_map(flat_map_func(t.b)).alias("a", "b"){code}



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