GitHub user davies opened a pull request:
https://github.com/apache/spark/pull/13179
[SPARK-15392] [SQL] fix default value of size estimation of logical plan
## What changes were proposed in this pull request?
We use autoBroadcastJoinThreshold + 1L as the default value of size
estimation, that is not good in 2.0, because we will calculate the size based
on size of schema, then the estimation could be less than
autoBroadcastJoinThreshold if you have an SELECT on top of an DataFrame created
from RDD.
This PR change the default value to Long.MaxValue.
## How was this patch tested?
Added regression tests.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/davies/spark fix_default_size
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/13179.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 #13179
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commit c90d7a016b6d0aadc7b34d709f0101f75e91c568
Author: Davies Liu <[email protected]>
Date: 2016-05-18T20:48:51Z
fix default size of logical plan
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