Read a Parquet file

'Parquet' is a columnar storage file format. This function enables you to read Parquet files into R.

read_parquet(
  file,
  col_select = NULL,
  as_data_frame = TRUE,
  props = ParquetReaderProperties$create(),
  ...
)

Arguments

file	A character file name, raw vector, or an Arrow input stream
col_select	A character vector of column names to keep, as in the "select" argument to data.table::fread(), or a tidy selection specification of columns, as used in dplyr::select().
as_data_frame	Should the function return a data.frame or an arrow::Table?
props	ParquetReaderProperties
...	Additional arguments passed to ParquetFileReader$create()

Value

A arrow::Table, or a data.frame if as_data_frame is TRUE.

Examples

# \donttest{
df <- read_parquet(system.file("v0.7.1.parquet", package="arrow"))
head(df)
#> # A tibble: 6 x 11
#>   carat cut   color clarity depth table price     x     y     z `__index_level_…
#>   <dbl> <chr> <chr> <chr>   <dbl> <dbl> <int> <dbl> <dbl> <dbl> <int64>         
#> 1 0.23  Ideal E     SI2      61.5    55 326    3.95  3.98  2.43 0               
#> 2 0.21  Prem… E     SI1      59.8    61 326    3.89  3.84  2.31 1               
#> 3 0.23  Good  E     VS1      56.9    65 327    4.05  4.07  2.31 2               
#> 4 0.290 Prem… I     VS2      62.4    58 334    4.2   4.23  2.63 3               
#> 5 0.31  Good  J     SI2      63.3    58 335    4.34  4.35  2.75 4               
#> 6 0.24  Very… J     VVS2     62.8    57 336    3.94  3.96  2.48 5               
# }