[R] printing data in Table/RecordBatch print method #32110
Description
Related to ARROW-16776 but after a brief discussion with Neal Richardson, he requested that I split the improvement request into separate issues.
When working with Arrow datasets/tables, I often find myself wanting to interactively print or "see" the results of a query or the first few rows of the data without having to fully collect into memory.
It would be ideal to lazily print some data with Table/RecordBatch print methods, however, currently, the print methods return schema without data.
IE:
library(dplyr)
library(arrow)
mtcars %>% arrow::write_parquet("mtcars.parquet")
car_ds <- arrow::open_dataset("mtcars.parquet")
car_ds
#> FileSystemDataset with 1 Parquet file
#> mpg: double
#> cyl: double
#> disp: double
#> hp: double
#> drat: double
#> wt: double
#> qsec: double
#> vs: double
#> am: double
#> gear: double
#> carb: double
#>
#> See $metadata for additional Schema metadata
car_ds %>%
compute()
#> Table
#> 32 rows x 11 columns
#> $mpg <double>
#> $cyl <double>
#> $disp <double>
#> $hp <double>
#> $drat <double>
#> $wt <double>
#> $qsec <double>
#> $vs <double>
#> $am <double>
#> $gear <double>
#> $carb <double>
#>
#> See $metadata for additional Schema metadataReporter: Thomas Mock
Related issues:
- [R] dplyr::glimpse method for arrow table and datasets (Blocked)
- [R] Improved print methods for Arrow tabulars (is duplicated by)
Note: This issue was originally created as ARROW-16777. Please see the migration documentation for further details.