R: Read a Parquet file

read_parquet {arrow}

R Documentation

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(),
  ...
)

`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` (default) or an Arrow Table?
`props`	ParquetReaderProperties
`...`	Additional arguments passed to `ParquetFileReader$create()`

A arrow::Table, or a data.frame if as_data_frame is TRUE (the default).


tf <- tempfile()
on.exit(unlink(tf))
write_parquet(mtcars, tf)
df <- read_parquet(tf)
head(df)

[Package arrow version 0.17.1 Index]