GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/2468
[SQL] Adds sizeInBytes statistics for Limit operator when all output
attributes are of native data types
This helps to replace shuffled hash joins with broadcast hash joins in some
cases.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark more-stats
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2468.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 #2468
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commit f30fe1d9bbe52b7e56b672c16c6e2511b902d6f5
Author: Cheng Lian <[email protected]>
Date: 2014-09-19T22:26:04Z
Adds sizeInBytes estimation for Limit when all output types are native types
commit 73faf696f6337f22c8cc70170487d3f4aedde12d
Author: Cheng Lian <[email protected]>
Date: 2014-09-19T22:38:42Z
Test case for auto choosing broadcast hash join
commit 5595a91f47e47971667121071721417df07ba79a
Author: Cheng Lian <[email protected]>
Date: 2014-09-19T22:43:37Z
Removes debugging code
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