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[SQL] [DOC] improved a comment

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[SQL][DOC] I found it a bit confusing when I came across it for the first time in the docs

Author: Radek Ostrowski <dest.hawaii@gmail.com>
Author: radek <radek@radeks-MacBook-Pro-2.local>

Closes #6332 from radek1st/master and squashes the following commits:

dae3347 [Radek Ostrowski] fixed typo
c76bb3a [radek] improved a comment
This commit is contained in:
Radek Ostrowski 2015-06-16 21:04:26 +01:00 committed by Sean Owen
parent dc455b8833
commit 4bd10fd509
2 changed files with 2 additions and 2 deletions
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2
docs/configuration.md
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@ -334,7 +334,7 @@ Apart from these, the following properties are also available, and may be useful
<td>
Enable profiling in Python worker, the profile result will show up by `sc.show_profiles()`,
or it will be displayed before the driver exiting. It also can be dumped into disk by
`sc.dump_profiles(path)`. If some of the profile results had been displayed maually,
`sc.dump_profiles(path)`. If some of the profile results had been displayed manually,
they will not be displayed automatically before driver exiting.
By default the `pyspark.profiler.BasicProfiler` will be used, but this can be overridden by

2
sql/core/src/main/scala/org/apache/spark/sql/DataFrame.scala
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@ -619,7 +619,7 @@ class DataFrame private[sql](
def as(alias: Symbol): DataFrame = as(alias.name)
/**
* Selects a set of expressions.
* Selects a set of column based expressions.
* {{{
* df.select($"colA", $"colB" + 1)
* }}}