GitHub user HyukjinKwon opened a pull request:
https://github.com/apache/spark/pull/17178
[SPARK-19828][R] Support array type in from_json in R
## What changes were proposed in this pull request?
Since we could not directly define the array type in R, this PR proposes to
support array types in R as string types that are used in `structField` as
below:
```R
jsonArr <- "[{\"name\":\"Bob\"}, {\"name\":\"Alice\"}]"
df <- as.DataFrame(list(list("people" = jsonArr)))
collect(select(df, alias(from_json(df$people,
"array<struct<name:string>>"), "arrcol")))
```
prints
```R
arrcol
1 Bob, Alice
```
## How was this patch tested?
Unit tests in `test_sparkSQL.R`.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/HyukjinKwon/spark SPARK-19828
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/17178.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 #17178
----
commit 10feb9d2e9e4d027f874e6f508e7e7421c95cd6d
Author: hyukjinkwon <[email protected]>
Date: 2017-03-06T11:15:45Z
Support array in from_json in R
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