Converts the contents of the named Parquet file to a R data frame.
Usage
read_parquet(file, options = parquet_options())Arguments
- file
Path to a Parquet file. It may also be an R connection, in which case it first reads all data from the connection, writes it into a temporary file, then reads the temporary file, and deletes it. The connection might be open, it which case it must be a binary connection. If it is not open, then
read_parquet()will open it and also close it in the end.- options
Nanoparquet options, see
parquet_options().
See also
See write_parquet() to write Parquet files,
nanoparquet-types for the R <-> Parquet type mapping.
See read_parquet_info(), for general information,
read_parquet_schema() for information about the
columns, and read_parquet_metadata() for the complete metadata.
Examples
file_name <- system.file("extdata/userdata1.parquet", package = "nanoparquet")
parquet_df <- nanoparquet::read_parquet(file_name)
print(str(parquet_df))
#> Classes ‘tbl’ and 'data.frame': 1000 obs. of 13 variables:
#> $ registration: POSIXct, format: "2016-02-03 07:55:29" "2016-02-03 17:04:03" ...
#> $ id : int 1 2 3 4 5 6 7 8 9 10 ...
#> $ first_name : chr "Amanda" "Albert" "Evelyn" "Denise" ...
#> $ last_name : chr "Jordan" "Freeman" "Morgan" "Riley" ...
#> $ email : chr "ajordan0@com.com" "afreeman1@is.gd" "emorgan2@altervista.org" "driley3@gmpg.org" ...
#> $ gender : Factor w/ 2 levels "Female","Male": 1 2 1 1 NA 1 2 2 2 1 ...
#> $ ip_address : chr "1.197.201.2" "218.111.175.34" "7.161.136.94" "140.35.109.83" ...
#> $ cc : chr "6759521864920116" NA "6767119071901597" "3576031598965625" ...
#> $ country : chr "Indonesia" "Canada" "Russia" "China" ...
#> $ birthdate : Date, format: "1971-03-08" "1968-01-16" ...
#> $ salary : num 49757 150280 144973 90263 NA ...
#> $ title : chr "Internal Auditor" "Accountant IV" "Structural Engineer" "Senior Cost Accountant" ...
#> $ comments : chr "1E+02" NA NA NA ...
#> NULL