GitHub user jackylk opened a pull request:
https://github.com/apache/carbondata/pull/1295 [CARBONDATA-1419] Support adaptive encoding for Double data type
Add two new encoding for Double data type:
1. AdaptiveFloatingCodec, it will multiple the column value by Math.pow(10, decimalCount) and do type cast from double to target data type like byte, short, int
2. AdaptiveDeltaFloatingCodec, it will first calculate the delta of column value and maximum value and multiple by Math.pow(10, decimalCount) and do type cast from double to target data type like byte, short, int
You can merge this pull request into a Git repository by running:
$ git pull
https://github.com/jackylk/incubator-carbondata upscale
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/carbondata/pull/1295.patchTo close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #1295
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commit 56548813f015b919f0304d45c117c6f93b1fadc0
Author: Jacky Li <
[hidden email]>
Date: 2017-08-29T04:09:47Z
support adaptive encoding for double
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