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Read JSON files using DuckDB

Source: R/read_json_duckdb.R
read_json_duckdb.Rd

read_json_duckdb() reads a JSON file using DuckDB's read_json() table function.

Usage

read_json_duckdb(
  path,
  ...,
  prudence = c("thrifty", "lavish", "stingy"),
  options = list()
)

Arguments

path

Path to files, glob patterns * and ? are supported.

...

These dots are for future extensions and must be empty.

prudence

Memory protection, controls if DuckDB may convert intermediate results in DuckDB-managed memory to data frames in R memory.

  • "thrifty": up to a maximum size of 1 million cells,

  • "lavish": regardless of size,

  • "stingy": never.

The default is "thrifty" for the ingestion functions, and may be different for other functions. See vignette("prudence") for more information.

options

Arguments to the DuckDB read_json table function.

See also

read_csv_duckdb(), read_parquet_duckdb()

Examples

if (FALSE) { # identical(Sys.getenv("IN_PKGDOWN"), "TRUE")

# Create and read a simple JSON file
path <- tempfile("duckplyr_test_", fileext = ".json")
writeLines('[{"a": 1, "b": "x"}, {"a": 2, "b": "y"}]', path)

# Reading needs the json extension
db_exec("INSTALL json")
db_exec("LOAD json")
read_json_duckdb(path)
}