pub fn count_rows(
path: &Path,
separator: u8,
quote_char: Option<u8>,
comment_prefix: Option<&CommentPrefix>,
eol_char: u8,
has_header: bool,
) -> Result<usize, PolarsError>Available on crate feature
polars-io only.Expand description
Read the number of rows without parsing columns useful for count(*) queries