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https://issues.apache.org/jira/browse/SPARK-17902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16209958#comment-16209958
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Hossein Falaki commented on SPARK-17902:
----------------------------------------
A simple unit test we could add would be:
{code}
> df <- createDataFrame(iris)
> sapply(iris, typeof) == sapply(collect(df, stringsAsFactors = T), typeof)
Sepal.Length Sepal.Width Petal.Length Petal.Width Species
TRUE TRUE TRUE TRUE FALSE
{code}
As for the solution, I suggest performing the conversion inside [this
loop|https://github.com/apache/spark/blob/master/R/pkg/R/DataFrame.R#L1168].
> collect() ignores stringsAsFactors
> ----------------------------------
>
> Key: SPARK-17902
> URL: https://issues.apache.org/jira/browse/SPARK-17902
> Project: Spark
> Issue Type: Bug
> Components: SparkR
> Affects Versions: 2.0.1
> Reporter: Hossein Falaki
>
> `collect()` function signature includes an optional flag named
> `stringsAsFactors`. It seems it is completely ignored.
> {code}
> str(collect(createDataFrame(iris), stringsAsFactors = TRUE)))
> {code}
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