GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/8031
[SPARK-4176] [SQL] [MINOR] Should use unscaled Long to write decimals for
precision <= 18 rather than 8
This PR fixes a minor bug introduced in #7455: when writing decimals, we
should use the unscaled Long for better performance when the precision <= 18
rather than 8 (should be a typo). This bug doesn't affect correctness, but
hurts Parquet decimal writing performance.
This PR also replaced similar magic numbers with newly defined constants.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark
spark-4176/minor-fix-for-writing-decimals
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8031.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #8031
----
commit 10d4ea3c87837e3c4b5b13535499ccd3a8f853b6
Author: Cheng Lian <[email protected]>
Date: 2015-08-07T12:29:17Z
Should use unscaled Long to write decimals for precision <= 18 rather than 8
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