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https://issues.apache.org/jira/browse/FLINK-8129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17328696#comment-17328696
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Flink Jira Bot commented on FLINK-8129:
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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.
> Add a union type
> ----------------
>
> Key: FLINK-8129
> URL: https://issues.apache.org/jira/browse/FLINK-8129
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API
> Reporter: Timo Walther
> Priority: Major
> Labels: stale-major
>
> Many input formats like Avro or ORC support union types to work with
> different types in one field. It might make sense to support those use cases
> in the Table & SQL API as well. A union type is similar to an {{Either}} type
> but takes an arbitrary number of possible types. It might considers {{null}}
> as a type. It is up for discussion if we want to add this type to
> {{flink-core}}.
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