[SPARK-20371][R] Add wrappers for collect_list and collect_set #17672

zero323 · 2017-04-18T17:52:02Z

What changes were proposed in this pull request?

Adds wrappers for collect_list and collect_set.

How was this patch tested?

Unit tests, check-cran.sh

SparkQA · 2017-04-18T18:26:48Z

Test build #75906 has finished for PR 17672 at commit 3b580ae.

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

SparkQA · 2017-04-18T19:05:37Z

Test build #75909 has finished for PR 17672 at commit e5bcb67.

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

SparkQA · 2017-04-18T20:55:04Z

Test build #75911 has finished for PR 17672 at commit a02a119.

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

zero323 · 2017-04-18T21:14:26Z

cc @felixcheung

felixcheung · 2017-04-19T02:33:01Z

R/pkg/R/functions.R

+
+#' collect_list
+#'
+#' Aggregate function: returns a list of objects with duplicates.


does other function has Aggregate function: in the description or this is carried over from Scala doc?
if latter we could go without - there's already a @family tag

From Scala docs. Removed.

felixcheung · 2017-04-19T02:34:59Z

R/pkg/R/functions.R

+#'
+#' @rdname collect_list
+#' @name collect_list
+#' @family aggregate_functions


I think there's an existing agg_funcs in R

Yes, corrected.

re: my other comments, my preference would be full text without underscore like @family aggregate functions. This isn't a key or id and it shows up in generated doc text. Anyway, that's a bigger change all around.

felixcheung · 2017-04-19T02:36:39Z

R/pkg/R/generics.R

@@ -918,6 +918,14 @@ setGeneric("cbrt", function(x) { standardGeneric("cbrt") })
 #' @export
 setGeneric("ceil", function(x) { standardGeneric("ceil") })

+#' @rdname collect_list


these are under ###################### Expression Function Methods ##########################
which doesn't seem like the right group

Let's continue here #17674 (comment)

ok, it's good.

felixcheung · 2017-04-19T02:37:03Z

R/pkg/inst/tests/testthat/test_sparkSQL.R

+    agg(gd3, collect_set(df8$age), collect_list(df8$age))
+  )
+
+  testthat::expect_equal(


why testthat::?

Just a habit. Corrected.

SparkQA · 2017-04-19T11:42:57Z

Test build #75940 has finished for PR 17672 at commit fdc0395.

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

felixcheung · 2017-04-20T04:11:59Z

R/pkg/R/functions.R

+#'
+#' @rdname collect_list
+#' @name collect_list
+#' @family agg_func


it has an 's' though agg_funcs - not to nit pick but it needs to match exactly

My bad.

On a side note, do you think we should provide detailed examples for each function?

we really should - it's a long standing concern that something like

@examples \dontrun{collect_list(df$x)}

is not useful at all. At least we should include how this goes into a select statement, and in some cases what the output looks like. However, with the number of sql functions we have it's a bit of ongoing work to improve this and we definitely can use more help on that

SparkQA · 2017-04-20T11:05:48Z

Test build #75982 has finished for PR 17672 at commit a089495.

This patch fails SparkR unit tests.
This patch merges cleanly.
This patch adds no public classes.

SparkQA · 2017-04-20T14:36:31Z

Test build #75988 has finished for PR 17672 at commit 944f5b4.

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

felixcheung · 2017-04-20T16:57:47Z

btw, fyi, you don't have to rebase or squash each time you push - it's actually easier to review if you don't - so reviewer can track comments and see the diff from the last time.

but I get that you might be rebasing because of conflict.

felixcheung

LGTM

zero323 · 2017-04-20T19:10:45Z

btw, fyi, you don't have to rebase or squash each time you push

Noted :) But yeah, there was a conflict after SPARK-20375.

At least we should include how this goes into a select statement, and in some cases what the output looks like.

It would be great.

felixcheung · 2017-04-21T19:06:34Z

merged to master.

zero323 · 2017-04-21T19:46:05Z

Thanks @felixcheung

zero323 · 2017-04-22T00:27:29Z

BTW @felixcheung - is there any deeper reason behind current stat of generics.R? I mean:

Inconsistent usage of standard and roxygen comments.
Marking functions which are not to be exported with @export.
Slightly mixed up order (both in groups and between groups).
Some minor inconsistencies (like marking asc as @rdname columnfunctions).

felixcheung · 2017-04-22T00:32:59Z

Not really its just inconsistent handling. Some comment changes can be deliberated though.

zero323 · 2017-04-22T00:56:07Z

Yeah, I have this feeling that it could be deliberate, but I cannot figure out what is the purpose. Removing @exports should be enough, shouldn't it?

I thought about cleaning this up, but I wonder if it is better to wait for SPARK-16693.

felixcheung · 2017-04-22T02:44:22Z

Will be probably cleaner

zero323 · 2017-05-15T11:00:51Z

@felixcheung Do you know by any chance what is the policy about adding new datasets to Spark? License restrictions, file size and such?

felixcheung · 2017-05-16T04:13:41Z

@zero323 I think that its license needs to be compatible with Apache 2.0 and it can't be big (since example data is in the release; no more than a few MB?) https://www.apache.org/licenses/

## What changes were proposed in this pull request? Adds wrappers for `collect_list` and `collect_set`. ## How was this patch tested? Unit tests, `check-cran.sh` Author: zero323 <[email protected]> Closes apache#17672 from zero323/SPARK-20371.

zero323 force-pushed the SPARK-20371 branch from 3b580ae to e5bcb67 Compare April 18, 2017 18:30

zero323 force-pushed the SPARK-20371 branch from e5bcb67 to a02a119 Compare April 18, 2017 20:18

felixcheung requested changes Apr 19, 2017

View reviewed changes

zero323 force-pushed the SPARK-20371 branch from a02a119 to fdc0395 Compare April 19, 2017 11:06

felixcheung requested changes Apr 20, 2017

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zero323 force-pushed the SPARK-20371 branch from fdc0395 to a089495 Compare April 20, 2017 10:29

Add wrappers for collect_list and collect_set

944f5b4

zero323 force-pushed the SPARK-20371 branch from a089495 to 944f5b4 Compare April 20, 2017 13:58

felixcheung approved these changes Apr 20, 2017

View reviewed changes

asfgit closed this in fd648bf Apr 21, 2017

zero323 deleted the SPARK-20371 branch April 26, 2017 13:18

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[SPARK-20371][R] Add wrappers for collect_list and collect_set #17672

[SPARK-20371][R] Add wrappers for collect_list and collect_set #17672

zero323 commented Apr 18, 2017

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[SPARK-20371][R] Add wrappers for collect_list and collect_set #17672

[SPARK-20371][R] Add wrappers for collect_list and collect_set #17672

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zero323 commented Apr 18, 2017

What changes were proposed in this pull request?

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