[jira] [Comment Edited] (AVRO-2918) Schema polymorphism

["Micah Kornfield (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AVRO-2918?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17178413#comment-17178413 ] 

Micah Kornfield edited comment on AVRO-2918 at 8/16/20, 3:48 AM:
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[~jonirap] its not entirely clear to me what this is proposing, could you maybe illustrate with some examples?


was (Author: emkornfield@gmail.com):
@Jonathan Rapoport its not entirely clear to me what this is proposing, could you maybe illustrate with some examples?

> Schema polymorphism
> -------------------
>
>                 Key: AVRO-2918
>                 URL: https://issues.apache.org/jira/browse/AVRO-2918
>             Project: Apache Avro
>          Issue Type: New Feature
>          Components: logical types, misc, spec
>            Reporter: Jonathan Rapoport
>            Priority: Major
>              Labels: features
>   Original Estimate: 96h
>  Remaining Estimate: 96h
>
> Include the option to use named types as base types for a new schema. Allow for MRO generation. Field inheritance. 
> The benefits of this approach include:
>  * Defining a schema as validation for a certain wire, and so allowing the receiver to be certain of the structure of the data (this works today). However, defining an extension of this schema, or certain schemas which can be normalized to the original schema, but contain additional information, will not allow it to be sent over the same wire.
>  * Backwards compatibility through inheritance - you never break the old schema, thus allowing a long integration period, with no need to recode all processes familiar with the schema. The new schema will simply inherit the old one, and only add information.
>  * Allow for full data control through polymorphism, and the ability to replace structures within any supported language. 



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