[
https://issues.apache.org/jira/browse/AVRO-1285?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13651326#comment-13651326
]
Doug Cutting commented on AVRO-1285:
------------------------------------
Sorry, I missed the "circular" part in the original description!
Note that Avro can actually parse print a circular schema as a finite
expression.
For example, your A can be defined as:
{code}
{"name":"A", "type":"record", "fields":[
{"name":"x", "type": {"name":"B", "type":"record", "fields":[{"name":"y",
"type":"A"}
]
}
{code}
and B can either be defined as a standalone schema, with:
{code}
{"name":"B", "type":"record", "fields":[
{"name":"y", "type": {"name":"A", "type":"record", "fields":[{"name":"x",
"type":"B"}
]
}
{code}
or, in the context of the above definition of A (using AVRO-872, AVRO-877,
AVRO-1188), as:
{code}
{"name":"B", "type":"record", "fields":[{"name":"y", "type":"A"}]}
{code}
So A and B can be defined in separate files, but at least one must currently
include the definition of the other. Changing the parser to fix this is
possible, but perhaps not trivial.
> Avro schema compile does not support circular reference
> -------------------------------------------------------
>
> Key: AVRO-1285
> URL: https://issues.apache.org/jira/browse/AVRO-1285
> Project: Avro
> Issue Type: New Feature
> Components: java
> Reporter: Viji
> Priority: Minor
> Attachments: multipass.tar
>
>
> While declaring a Schema, doing a circular reference is not possible if the
> Schema for the external reference is in another file. Attached is a project
> that provides 2 schemas that exhibits this missing feature.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
