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https://issues.apache.org/jira/browse/ARROW-6337?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16914436#comment-16914436
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Neal Richardson commented on ARROW-6337:
----------------------------------------
It is slightly more nuanced than that. It is a tibble, per the object class,
but if you don't load the tibble package, those methods won't be available, so
it will just behave like a plain data.frame:
{code:java}
> example(read_parquet)
rd_prq> ## No test:
rd_prq> try({
rd_prq+ df <- read_parquet(system.file("v0.7.1.parquet", package="arrow"))
rd_prq+ })
rd_prq> ## End(No test)
rd_prq>
rd_prq>
rd_prq>
> df
carat cut color clarity depth table price x y z
1 0.23 Ideal E SI2 61.5 55 326 3.95 3.98 2.43
2 0.21 Premium E SI1 59.8 61 326 3.89 3.84 2.31
3 0.23 Good E VS1 56.9 65 327 4.05 4.07 2.31
4 0.29 Premium I VS2 62.4 58 334 4.20 4.23 2.63
5 0.31 Good J SI2 63.3 58 335 4.34 4.35 2.75
6 0.24 Very Good J VVS2 62.8 57 336 3.94 3.96 2.48
7 0.24 Very Good I VVS1 62.3 57 336 3.95 3.98 2.47
8 0.26 Very Good H SI1 61.9 55 337 4.07 4.11 2.53
9 0.22 Fair E VS2 65.1 61 337 3.87 3.78 2.49
10 0.23 Very Good H VS1 59.4 61 338 4.00 4.05 2.39
__index_level_0__
1 0
2 1
3 2
4 3
5 4
6 5
7 6
8 7
9 8
10 9
> library(tibble)
> df
# A tibble: 10 x 11
carat cut color clarity depth table price x y z
<dbl> <chr> <chr> <chr> <dbl> <dbl> <int> <dbl> <dbl> <dbl>
1 0.23 Ideal E SI2 61.5 55 326 3.95 3.98 2.43
2 0.21 Prem… E SI1 59.8 61 326 3.89 3.84 2.31
3 0.23 Good E VS1 56.9 65 327 4.05 4.07 2.31
4 0.290 Prem… I VS2 62.4 58 334 4.2 4.23 2.63
5 0.31 Good J SI2 63.3 58 335 4.34 4.35 2.75
6 0.24 Very… J VVS2 62.8 57 336 3.94 3.96 2.48
7 0.24 Very… I VVS1 62.3 57 336 3.95 3.98 2.47
8 0.26 Very… H SI1 61.9 55 337 4.07 4.11 2.53
9 0.22 Fair E VS2 65.1 61 337 3.87 3.78 2.49
10 0.23 Very… H VS1 59.4 61 338 4 4.05 2.39
# … with 1 more variable: `__index_level_0__` <integr64>
> class(df)
[1] "tbl_df" "tbl" "data.frame"
{code}
Stay tuned for some upcoming features that will help sort out this interface
more naturally.
> [R] as_tibble in R API is a misnomer
> ------------------------------------
>
> Key: ARROW-6337
> URL: https://issues.apache.org/jira/browse/ARROW-6337
> Project: Apache Arrow
> Issue Type: Improvement
> Components: R
> Reporter: James Lamb
> Priority: Minor
>
> As of ARROW-5190, the R package's dependency on *tibble* has been moved from
> *Imports* to *Suggests*. However, this signature of *read_parquet(),
> read_delim_arrow(), read_json_arrow(),* and *read_feather()* all still have
> an argument called "as_tibble".
> Per [this
> comment|[https://github.com/apache/arrow/pull/4454#issuecomment-500563214],]
> the argument "as_tibble" is a misnomer. If that argument is given a TRUE,
> those functions will return a data.frame, not a tibble. I agree with Neal's
> comment...I think that instead of changing return type based on a boolean, it
> would be better for all the *read_** functions to return a data.frame and for
> other types of operations to get their own functions.
> I think it's important to consider this type of user-facing breaking change
> _now_ while the R package's version is still 0.x.
> As always, thanks for hearing me out!
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