[jira] [Commented] (PHOENIX-374) Enable access to dynamic columns in * or cf.* selection

["Geoffrey Jacoby (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PHOENIX-374?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16781116#comment-16781116 ] 

Geoffrey Jacoby commented on PHOENIX-374:
-----------------------------------------

+1, thanks [~ckulkarni]

> Enable access to dynamic columns in * or cf.* selection
> -------------------------------------------------------
>
>                 Key: PHOENIX-374
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-374
>             Project: Phoenix
>          Issue Type: New Feature
>            Reporter: nicolas maillard
>            Assignee: Chinmay Kulkarni
>            Priority: Critical
>         Attachments: PHOENIX-374-4.x-HBase-1.4_addendum.patch, PHOENIX-374.patch
>
>          Time Spent: 4h
>  Remaining Estimate: 0h
>
> As of recent work we can now read and write columns that are not in the schema, AKA dynamic columns. the Select and Upsert allow dynamic columns to be specified. 
> I think two additions are still needed.
> - Alter dynamicly: In the Upsert and/or Select statement  the ability to add on the specified dynamic column to schema. Say Upsert into Table (key, cf.dynColumn varchar SCHEMAADD) values (..)
> and for select: 
>      - select key, cf.dynColumn varchar from T would only read
>      - select key from T(cf.dynColumn varchar ) would only read and wrtie to schema
> - Select a complete column Family: More complex, accessing a whole Column Family with all rows known in schema or not.
>  select cf.* from T
> today this works for know columns it could be nice to have this for all columns of a family in the schema or not. I'm trying right now to extend this to schema for unknown columns. However every new row can a lot of very different unknowcolumns. The defined ones will be first but the unknown one will be appended at the end.
> This means the metadata might need to be updated at every row to account for all new columns discovered.



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