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From "James Taylor (JIRA)" <>
Subject [jira] [Commented] (PHOENIX-4737) Use position as column qualifier for APPEND_ONLY_SCHEMA
Date Mon, 14 May 2018 00:40:00 GMT


James Taylor commented on PHOENIX-4737:

[~tdsilva] - please review. The check that prevents add columns to tables/views is the only
check necessary, since a view derived from another view will add any new columns to the position
after the inherited parent columns.

> Use position as column qualifier for APPEND_ONLY_SCHEMA
> -------------------------------------------------------
>                 Key: PHOENIX-4737
>                 URL:
>             Project: Phoenix
>          Issue Type: Improvement
>            Reporter: James Taylor
>            Assignee: James Taylor
>            Priority: Major
>             Fix For: 4.14.0, 5.0.0
>         Attachments: PHOENIX-4737_v1.patch
> An easy way to prevent gaps in the column encoding used to define column qualifiers is
to use the position to define the column qualifier. This only works if:
>  * You disallow removes of columns
>  * You disallow adding columns to the base table
> This is pretty easy to enforce and will enable column encoding to be used effectively
when a base table has many views.

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