pub fn count_rows_from_slice(
bytes: &[u8],
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