Function polars_io::csv::read::count_rows

source ยท 
pub fn count_rows(
    path: &PathBuf,
    separator: u8,
    quote_char: Option<u8>,
    comment_prefix: Option<&CommentPrefix>,
    eol_char: u8,
    has_header: bool
) -> PolarsResult<usize>
Available on crate features csv or json only.
Expand description

Read the number of rows without parsing columns useful for count(*) queries