arrow (version 0.17.1)

read_parquet: Read a Parquet file

Description

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

Usage

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 (default) 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 (the default).

Examples

# NOT RUN {
tf <- tempfile()
on.exit(unlink(tf))
write_parquet(mtcars, tf)
df <- read_parquet(tf)
head(df)
# }