[ https://issues.apache.org/jira/browse/FLINK-40420 ]


    Bettle deleted comment on FLINK-40420:
    --------------------------------

was (Author: JIRAUSER313759):
Hi [~dianfu], yes, I’ll give it a try. I’ll share my proposed approach with you 
before implementing it and check in on any design questions along the way to 
make sure we’re aligned. Thanks!

> Add set operations to DataFrame API
> -----------------------------------
>
>                 Key: FLINK-40420
>                 URL: https://issues.apache.org/jira/browse/FLINK-40420
>             Project: Flink
>          Issue Type: Sub-task
>          Components: API / Python
>            Reporter: Liu Liu
>            Assignee: Bettle
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 2.4.0
>
>
> Add relational set operations to DataFrame:
> {code:java}
> def union(self, other: DataFrame) -> DataFrame
> def union_all(self, other: DataFrame) -> DataFrame
> def intersect(self, other: DataFrame) -> DataFrame
> def intersect_all(self, other: DataFrame) -> DataFrame
> def minus(self, other: DataFrame) -> DataFrame
> def minus_all(self, other: DataFrame) -> DataFrame {code}



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