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From "Thiruvalluvan M. G. (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AVRO-1723) Add support for forward declarations in avro IDL
Date Mon, 01 May 2017 04:16:04 GMT

    [ https://issues.apache.org/jira/browse/AVRO-1723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15990573#comment-15990573
] 

Thiruvalluvan M. G. commented on AVRO-1723:
-------------------------------------------

[~zolyfarkas] Great. I just added a test for forward reference: https://github.com/zolyfarkas/avro/pull/2.
Please merge it to your branch when you can.

I'll pull your patch in two days.

> Add support for forward declarations in avro IDL
> ------------------------------------------------
>
>                 Key: AVRO-1723
>                 URL: https://issues.apache.org/jira/browse/AVRO-1723
>             Project: Avro
>          Issue Type: Improvement
>    Affects Versions: 1.8.0
>            Reporter: Zoltan Farkas
>            Assignee: Zoltan Farkas
>         Attachments: AVRO-1723.patch
>
>
> Currently Recursive data structures like:
> record SampleNode {
>    int count = 0;
>    array<SamplePair> samples = [];
> }
> record SamplePair {
>  string name;
>  SampleNode node;
> }
> It is not possible to declare in IDL,
> however it is possible to declare in avsc (with fix from https://issues.apache.org/jira/browse/AVRO-1667
)
> It is actually not complicated to implement, here is some detail on a possible implementation:
> https://github.com/zolyfarkas/avro/commit/210c50105717149f3daa39b8d4160b8548b8e363
> This would close a capability gap with google protocol buffers...



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