RE: About ColumnGroup feature
Posted by
Jihong Ma on
Jun 12, 2017; 5:39pm
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/About-ColumnGroup-feature-tp14436p14709.html
not a feature beneficial to real-world application, vote for A!
Jihong
-----Original Message-----
From: Jacky Li [mailto:
[hidden email]]
Sent: Friday, June 09, 2017 6:05 PM
To:
[hidden email]
Subject: About ColumnGroup feature
Hi Community,
In JIRA 1014, we are adding Unsafe ColumnPage in data load process to reduce GC, and adding EncodingStrategy for Encoding Overriding features to make open up encoding interface for both usability and extensibility.
When implementing these new features, I found ColumnGroup feature creates unnecessary burden on data loading code and makes developer interfaces more complex to use. For example, since ColumnGroup can appear in any field in the table, even in SORT_COLUMNS, it forces developer to understand ColumnGroup concept and handle it in its encoding implementation.
As far as I know, there is not much discussion on ColumnGroup in the mail list and I think it is high possibility that no one is using it. So I am proposing to remove this feature and it can enable carbon to make Encoding interface cleaner for developers.
Please vote:
A. Remove it
B. Not remove it, and provide reason
Thanks,
Jacky Li