Function fmt_text_constant_rows

src/expr/src/explain/text.rs:1462–1493

(
    f: &mut fmt::Formatter<'_>,
    mut rows: I,
    ctx: &mut Indent,
    redacted: bool,
)

}

pub fn fmt_text_constant_rows<'a, I>(
    f: &mut fmt::Formatter<'_>,
    mut rows: I,
    ctx: &mut Indent,
    redacted: bool,
) -> fmt::Result
where
    I: Iterator<Item = (&'a Row, &'a Diff)>,
{
    let mut row_count = Diff::ZERO;
    let mut first_rows = Vec::with_capacity(20);
    for _ in 0..20 {
        if let Some((row, diff)) = rows.next() {
            row_count += diff.abs();
            first_rows.push((row, diff));
        }
    }
    let rest_of_row_count = rows.map(|(_, diff)| diff.abs()).sum::<Diff>();
    if !rest_of_row_count.is_zero() {
        writeln!(
            f,
            "{}total_rows (diffs absed): {}",
            ctx,
            row_count + rest_of_row_count
        )?;
        writeln!(f, "{}first_rows:", ctx)?;
        ctx.indented(move |ctx| write_first_rows(f, &first_rows, ctx, redacted))?;
    } else {
        write_first_rows(f, &first_rows, ctx, redacted)?;
    }
    Ok(())
}

fn write_first_rows(
    f: &mut fmt::Formatter<'_>,