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Posted to dev@avro.apache.org by "Zoltan Farkas (JIRA)" <ji...@apache.org> on 2015/08/31 16:17:46 UTC

[jira] [Created] (AVRO-1723) Add support for forward declarations in avro IDL

Zoltan Farkas created AVRO-1723:
-----------------------------------

             Summary: 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


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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