GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/8929
[SPARK-10859] [SQL] fix stats of StringType in columnar cache
The UTF8String may come from UnsafeRow, then underline buffer of it is not
copied, so we should clone it in order to hold it in Stats.
cc @yhuai
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark pushdown_string
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/8929.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 #8929
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commit 0ea9d09a72dd11136e82aec7b7246da64ac2d81e
Author: Davies Liu <dav...@databricks.com>
Date: 2015-09-28T19:20:53Z
fix stats of StringType in columnar cache
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