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https://issues.apache.org/jira/browse/FLINK-41273?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=18142946#comment-18142946
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Gustavo de Morais commented on FLINK-41273:
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Fixed in release-2.4 via [#29855|https://github.com/apache/flink/pull/29855]:
*
[5d5c1882f63c931be9d631f79d27c8ee588a04ef|https://github.com/apache/flink/commit/5d5c1882f63c931be9d631f79d27c8ee588a04ef]
[FLINK-41273][table] Support set operations on unbounded tables in the Table
API
> Allow UNION, INTERSECT and EXCEPT on unbounded tables in the Table API
> ----------------------------------------------------------------------
>
> Key: FLINK-41273
> URL: https://issues.apache.org/jira/browse/FLINK-41273
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / API
> Reporter: Timo Theusner
> Assignee: Timo Theusner
> Priority: Major
> Labels: pull-request-available
> Fix For: 2.4.0, 2.5.0
>
>
> In streaming mode, {{SetOperationFactory#failIfStreaming}} rejects {{union}},
> {{intersect}}, {{intersectAll}}, {{minus}} and {{minusAll}}, although
> streaming SQL runs {{UNION}}, {{INTERSECT}} and {{EXCEPT}} with the same
> plans. Lift the check and also fix SQL serialization of {{minus}} in
> {{SetQueryOperation#asSerializableString}} to render {{EXCEPT}}.
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