GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/2215
[SPARK-2973][SQL] Lightweight SQL commands without distributed jobs when
calling .collect()
By overriding `executeCollect()` in physical plan classes of all commands,
we can avoid to kick off a distributed job when collecting result of a SQL
command, e.g. `sql("SET").collect()`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark lightweight-commands
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/2215.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 #2215
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commit 55b2aa5e4d5be7ba8edba9ef63fa75feab3ae03c
Author: Cheng Lian <[email protected]>
Date: 2014-08-30T09:26:53Z
Avoids distributed jobs when execution SQL commands
commit 542977c20bca8ea1eb529a3a9aa6d566eeb08160
Author: Cheng Lian <[email protected]>
Date: 2014-08-30T09:33:35Z
Avoids confusion between logical and physical plan by adding package
prefixes
commit 995bdd8012f41c421fd687e5d72b03808244c99a
Author: Cheng Lian <[email protected]>
Date: 2014-08-30T09:47:56Z
Cleaned up DescribeHiveTableCommand
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