[SPARK-16381][SQL][SparkR] Update SQL examples and programming guide for R language binding by keypointt · Pull Request #14082 · apache/spark

keypointt · 2016-07-06T23:53:58Z

https://issues.apache.org/jira/browse/SPARK-16381

What changes were proposed in this pull request?

Update SQL examples and programming guide for R language binding.

Here I just follow example master...liancheng:example-snippet-extraction, created a separate R file to store all the example code.

How was this patch tested?

Manual test on my local machine.
Screenshot as below:

SparkQA · 2016-07-07T00:25:25Z

Test build #61881 has finished for PR 14082 at commit e7def7c.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

liancheng · 2016-07-07T04:21:42Z

@shivaram @mengxr It would be nice if any of you can help review this one, thanks!

shivaram · 2016-07-07T22:21:05Z

I'll take a look at this today. Also cc @felixcheung

felixcheung · 2016-07-07T22:52:55Z

-## 30 1
-
-{% endhighlight %}
+{% include_example untyped_transformations r/RSparkSQLExample.R %}


this is just internal stuff, but "untyped_transformations" is a bit odd? shouldn't we call this "dataframe_operations" or something?

felixcheung · 2016-07-07T23:01:55Z

looks good, only this minor comment: #14082 (comment)
and some improvement suggestions to example code.

keypointt · 2016-07-07T23:16:14Z

thanks a lot @felixcheung , working on it

SparkQA · 2016-07-08T01:20:22Z

Test build #61946 has finished for PR 14082 at commit 1af09f3.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2016-07-08T07:18:35Z

Test build #61970 has finished for PR 14082 at commit 828b2cf.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2016-07-08T07:30:05Z

Test build #61971 has finished for PR 14082 at commit 7dca42d.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

shivaram · 2016-07-08T18:42:11Z

+library(SparkR)
+
+# $example on:init_session$
+sparkR.session()


The python code snippet shows how to set appName, options etc. Could we do something similar here ? i.e something like
sparkR.session(appName='MyApp', sparkConfig=list(spark.executor.memory="1g"))

sure I'll add it

… SPARK-16381

shivaram · 2016-07-08T18:59:00Z

+head(teenagers)
+## name
+## 1 Justin
+


Would be good to add a comment as to what we are doing in the following code block. Something like We can also run custom R-UDFs on Spark DataFrames. Here we prefix all the names with "Name:"

SparkQA · 2016-07-08T19:24:37Z

Test build #61993 has finished for PR 14082 at commit cd184b3.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2016-07-08T19:50:07Z

Test build #61995 has finished for PR 14082 at commit d5b0b7f.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

shivaram · 2016-07-08T21:44:33Z

Thanks @keypointt -- Changes look good to me. @felixcheung any other comments ?

felixcheung · 2016-07-08T22:40:35Z

+library(SparkR)
+
+# $example on:init_session$
+sparkR.session(appName='MyApp', sparkConfig=list(spark.executor.memory="1g"))


I think it'll be great if you could run lint-r on this, typically, our R style would be something like this with extra spaces:
sparkR.session(appName = "MyApp", sparkConfig = list(spark.executor.memory = "1g"))
you might also want to use " to be consistent.

I just found some inconsistency like below, and I'll follow the style you suggested.
no space: https://github.com/keypointt/spark/blob/d5b0b7f111a28c63ca6e501ff0017af64881f0b4/examples/src/main/r/ml.R#L25
with space: https://github.com/keypointt/spark/blob/d5b0b7f111a28c63ca6e501ff0017af64881f0b4/examples/src/main/r/ml.R#L34

we should probably update those too..

ok I'll just submit a quick minor patch

felixcheung · 2016-07-08T22:42:46Z

looks good except for one comment. thanks for putting this together!

felixcheung · 2016-07-08T23:26:25Z

LGTM

keypointt · 2016-07-08T23:56:22Z

I just did a quick scan, the no-space style like session(appName='MyApp', sparkConfig=list(spark.executor.memory="1g")) is only found in example/ folder (in above commit), and all r files are following space style under R/pkg/

shivaram · 2016-07-08T23:57:45Z

Thanks @keypointt -- LGTM. Will merge this once Jenkins passes

keypointt · 2016-07-09T00:17:39Z

Thank you for reviewing :)

SparkQA · 2016-07-09T00:23:58Z

Test build #62005 has finished for PR 14082 at commit 7195750.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2016-07-09T01:00:31Z

Test build #62004 has finished for PR 14082 at commit a1eca2b.

This patch passes all tests.
This patch merges cleanly.
This patch adds no public classes.

liancheng · 2016-07-11T12:02:29Z

Since both @shivaram and @felixcheung signed this off, I'm merging this to master and branch-2.0.

Thanks @keypointt for working on this and @shivaram and @felixcheung for the review!

…for R language binding https://issues.apache.org/jira/browse/SPARK-16381 ## What changes were proposed in this pull request? Update SQL examples and programming guide for R language binding. Here I just follow example master...liancheng:example-snippet-extraction, created a separate R file to store all the example code. ## How was this patch tested? Manual test on my local machine. Screenshot as below: ![screen shot 2016-07-06 at 4 52 25 pm](https://cloud.githubusercontent.com/assets/3925641/16638180/13925a58-439a-11e6-8d57-8451a63dcae9.png) Author: Xin Ren <iamshrek@126.com> Closes#14082 from keypointt/SPARK-16381. (cherry picked from commit 9cb1eb7) Signed-off-by: Cheng Lian <lian@databricks.com>

[SPARK-16381] move example code to a separate R file
e7def7c

felixcheung reviewed Jul 7, 2016
View reviewed changes

[SPARK-16381] some fixes, more to come
1af09f3

keypointt added 4 commits July 7, 2016 23:11

[SPARK-16381] make schema merge example runnable
9ac6a70

[SPARK-16381] make sql_query example runnable
05ee46b

[SPARK-16381] make load_programmatically example runnable
828b2cf

[SPARK-16381] replace last showDF()
7dca42d

shivaram reviewed Jul 8, 2016
View reviewed changes

keypointt added 3 commits July 8, 2016 11:49

Merge branch 'master' into SPARK-16381
34ca57c

Merge branch 'SPARK-16381' ofhttps://github.com/keypointt/sparkinto…
af2365c
… SPARK-16381

[SPARK-16381] minor fix
cd184b3

shivaram reviewed Jul 8, 2016
View reviewed changes

keypointt added 2 commits July 8, 2016 12:01

[SPARK-16381] make it verbose
5e95fdd

[SPARK-16381] remove code duplicate etc
d5b0b7f

felixcheung reviewed Jul 8, 2016
View reviewed changes

[SPARK-16381] style fix
a1eca2b

[SPARK-16381] fix space style in other r examples
7195750

asfgit closed this in 9cb1eb7Jul 11, 2016

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keypointt commented Jul 6, 2016

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felixcheungJul 8, 2016•
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