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builtin_read_parquet

r::interpreter::builtins::parquet

Function builtin_read_parquet 

Source 
fn builtin_read_parquet(
    args: &[RValue],
    named: &[(String, RValue)],
    context: &BuiltinContext<'_>,
) -> Result<RValue, RError>
Expand description

Read a Parquet file into a data.frame.

Converts Arrow column types to R vectors:

  • Int8/Int16/Int32/Int64 -> Integer
  • UInt8/UInt16/UInt32 -> Integer
  • UInt64/Float32/Float64 -> Double
  • Boolean -> Logical
  • Utf8/LargeUtf8 -> Character
  • null values -> NA

@param file character scalar: path to the Parquet file @param columns character vector: optional column names to read (default: all) @return data.frame with columns from the Parquet file