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read_json_arrow

Read a JSON file

Description

Using JsonTableReader

Usage

read_json_arrow(
  file,
  col_select = NULL,
  as_data_frame = TRUE,
  schema = NULL,
  ...
)

Arguments

`file`	A character file name or URI, `raw` vector, an Arrow input stream, or a `FileSystem` with path (`SubTreeFileSystem`). If a file name, a memory-mapped Arrow InputStream will be opened and closed when finished; compression will be detected from the file extension and handled automatically. If an input stream is provided, it will be left open.
`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?
`schema`	Schema that describes the table.
`...`	Additional options passed to `JsonTableReader$create()`

Value

A data.frame, or a Table if as_data_frame = FALSE.

Examples

tf <- tempfile()
  on.exit(unlink(tf))
  writeLines('
    { "hello": 3.5, "world": false, "yo": "thing" }
    { "hello": 3.25, "world": null }
    { "hello": 0.0, "world": true, "yo": null }
  ', tf, useBytes=TRUE)
  df <- read_json_arrow(tf)

arrow

Integration to 'Apache' 'Arrow'

v4.0.0.1

Apache License (>= 2.0)

Authors

Neal Richardson [aut, cre], Ian Cook [aut], Jonathan Keane [aut], Romain François [aut] (<https://orcid.org/0000-0002-2444-4226>), Jeroen Ooms [aut], Javier Luraschi [ctb], Jeffrey Wong [ctb], Apache Arrow [aut, cph]

Initial release

read_json_arrow

Description

Usage

Arguments

Value

Examples

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