Function polars_io::csv_core::utils::infer_file_schema

pub fn infer_file_schema(
    reader_bytes: &ReaderBytes<'_>, 
    delimiter: u8, 
    max_read_records: Option<usize>, 
    has_header: bool, 
    schema_overwrite: Option<&Schema>, 
    skip_rows: &mut usize, 
    comment_char: Option<u8>, 
    quote_char: Option<u8>
) -> Result<(Schema, usize)>

This is supported on crate features csv-file and private only.

Infer the schema of a CSV file by reading through the first n records of the file, with max_read_records controlling the maximum number of records to read.

If max_read_records is not set, the whole file is read to infer its schema.

Return inferred schema and number of records used for inference.