Re: XOR encoding for floating point

Posted by Jacky Li on Jul 06, 2017; 12:45am
URL: http://apache-carbondata-dev-mailing-list-archive.168.s1.nabble.com/XOR-encoding-for-floating-point-tp17347p17415.html

+1

Feel free to contribute :)
To implement this feature, I think you need to break this feature into following sub tasks.
1. You can extend ColumnPageCodec to implement XOR encoding.
2. Come up with the criteria of how to select this encoding and change behavior of DefaultEncodingStrategy
3. SQL syntax for this encoding.

The encoding override work is still going on. The SQL syntax part is missing, so the point 3 can be done later.


Regards,
Jacky

> 在 2017年7月5日，下午3:32，Geetika Gupta <[hidden email]> 写道：
>
> Hi Community,
>
> I was looking into CARBONDATA-1128
> <https://issues.apache.org/jira/browse/CARBONDATA-1128>. The document
> attached with the Jira describes about compression of timestamp and decimal
> values. The decimal values are compressed using XOR. So I would like to
> contribute to one of its subtask i.e. CARBONDATA-1130
> <https://issues.apache.org/jira/browse/CARBONDATA-1130>.
>
> --
> Regards,
> Geetika Gupta