GitHub user pwendell opened a pull request:
https://github.com/apache/spark/pull/5757
[SPARK-7204] Fix callSite for Dataframe and SQL operations
This patch adds SQL to the set of excluded libraries when
generating a callSite. This makes the callSite mechanism work
properly for the data frame API. I also added a small improvement for
JDBC queries where we just use the string "Spark JDBC Server Query"
instead of trying to give a callsite that doesn't make any sense
to the user.
Before (DF):

After (DF):

After (JDBC):

You can merge this pull request into a Git repository by running:
$ git pull https://github.com/pwendell/spark dataframes
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/5757.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 #5757
----
commit 85bf74095c8600681fba1c487cc1015cb0c44058
Author: Patrick Wendell <[email protected]>
Date: 2015-04-28T20:22:11Z
[SPARK-7204] Fix callsite for dataframe operations.
This patch adds SQL to the set of excluded libraries when
generating a callSite. This makes the callSite mechanism work
properly for the data frame API. I also added a small improvement for
JDBC queries where we just use the string "Spark JDBC Server Query"
instead of trying to give a callsite that doesn't make any sense
to the user.
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