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https://issues.apache.org/jira/browse/AVRO-3649?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17656072#comment-17656072
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ASF subversion and git services commented on AVRO-3649:
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Commit c28dbe9f7d485f5e5d1df41df1bb2c12c838b5db in avro's branch
refs/heads/avro-3683-multiple-schemas from Christophe Le Saec
[ https://gitbox.apache.org/repos/asf?p=avro.git;h=c28dbe9f7 ]
AVRO-3649: default for union inside union
> [JAVA] reorder union types to match default value
> -------------------------------------------------
>
> Key: AVRO-3649
> URL: https://issues.apache.org/jira/browse/AVRO-3649
> Project: Apache Avro
> Issue Type: Improvement
> Reporter: Daniel Heinrich
> Assignee: Christophe Le Saec
> Priority: Trivial
> Labels: pull-request-available
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
> The Avro specification requires that a default value matches the first schema
> of a union type.
>
> Using @Nullable on a field will return a union type of the form ["null",
> "<something>"].
> @Nullable also sets the default value to "null".
>
> It is not possible to override this default value w{color:#172b4d}ith
> @AvroDefault because of the order of the schemas in the generated
> union.{color}
>
> It would be nice that union types are automatically reordered to match the
> type of the provided default value.
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