You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@avro.apache.org by "Ashok (JIRA)" <ji...@apache.org> on 2018/02/21 23:09:06 UTC

[jira] [Created] (AVRO-2148) Avro: Schema compatibility/evolution - attribute size change

Ashok created AVRO-2148:
---------------------------

             Summary: Avro: Schema compatibility/evolution - attribute size change
                 Key: AVRO-2148
                 URL: https://issues.apache.org/jira/browse/AVRO-2148
             Project: Avro
          Issue Type: Improvement
          Components: java
    Affects Versions: 1.8.2
            Reporter: Ashok


Let's assume the schema changed from V1 to V2.  Currently, we can't create a merge of the two schema that makes it a compatible for both.  Depending on what size we keep in the reader schema (the merged schema), you can read avro files for schema V1 or V2.

 
 * *V1 schema:*

{ "name": "sid", "type": [ "null", { "type": "fixed", "name": "SID", "namespace": "com.int.datatype", "doc": "", *"size": 64* }
], "doc": "", "default": null, "businessLogic": "" }

 
 * *V2 schema:*

{ "name": "sid", "type": [ "null", { "type": "fixed", "name": "SID", "namespace": "com.int.datatype", "doc": "", *"size": 16* }
], "doc": "", "default": null, "businessLogic": "" }



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)