[jira] [Commented] (PHOENIX-2896) Support encoded column qualifiers per column family

["Samarth Jain (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PHOENIX-2896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15849136#comment-15849136 ] 

Samarth Jain commented on PHOENIX-2896:
---------------------------------------

I almost forgot why we wanted to have a single counter for mutable tables. So for my own memory and for others who might be interested: for mutable tables, in cases of ORDER BY and GROUP BY on key value columns, we use the EncodedColumnQualifierCellsList where each column qualifier has a unique place. By using a single counter, we can guarantee that all column qualifiers are unique across all the column families.

> Support encoded column qualifiers per column family 
> ----------------------------------------------------
>
>                 Key: PHOENIX-2896
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-2896
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: Thomas D'Silva
>            Assignee: Samarth Jain
>             Fix For: 4.10.0
>
>
> This allows us to reduce the number of null values in the stored array that contains all columns for a give column family for the COLUMNS_STORED_IN_SINGLE_CELL Storage Scheme.



--
This message was sent by Atlassian JIRA
(v6.3.15#6346)