GitHub user watermen opened a pull request:
https://github.com/apache/spark/pull/5602
[SPARK-7024][SQL] Improve performance of function containsStar.
The function before will calculate at least `expression.size` times.
The function after will calculate at least `1` times.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/watermen/spark SPARK-7024
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5602.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 #5602
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commit 6f3dbea118d835d7b6743774bf6f704147190f70
Author: Yadong Qi <[email protected]>
Date: 2015-04-21T03:33:43Z
improve performance of containsStar.
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