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https://issues.apache.org/jira/browse/PHOENIX-1514?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14251254#comment-14251254
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James Taylor commented on PHOENIX-1514:
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[~elilevine] - I documented the current backward compat contract on our website 
here: http://phoenix.apache.org/upgrading.html, and I think going forward (post 
4.2) there's general consensus that we want to support a "mixed" set of clients 
against a new version of Phoenix on the server-side: PHOENIX-1483. Other than 
that, I think the burden is on us to provide adequate testing to meet this 
contract. Small versus big in terms of lines of code changed isn't a good 
metric IMHO. If everything continues working according to our backward compat 
contract and our API contract (which is JDBC and SQL), then I think we're free 
to innovate. If you want to start a conversation on private@ that's fine too.

> Break up PDataType Enum
> -----------------------
>
>                 Key: PHOENIX-1514
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-1514
>             Project: Phoenix
>          Issue Type: Sub-task
>    Affects Versions: 5.0.0
>            Reporter: Nick Dimiduk
>            Assignee: Nick Dimiduk
>             Fix For: 5.0.0
>
>         Attachments: PHOENIX-1514.00.patch, PHOENIX-1514.01.patch, 
> PHOENIX-1514.02.patch, PHOENIX-1514.04.patch, PHOENIX-1514.05.patch, 
> hung-phoenix-verify.txt, stack.txt
>
>
> A first step in adopting (a portion of) HBase's type encodings is to break up 
> the PDataType enum into an interface. This will pave the way for more 
> flexibility going forward.



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