Function build_null_buffer

nodedb-strict/src/arrow_extract.rs:75–93

Build a NullBuffer from the null bitmap of N tuples for a given column.

(
    decoder: &TupleDecoder,
    tuples: &[&[u8]],
    col_idx: usize,
)

/// Build a NullBuffer from the null bitmap of N tuples for a given column.
fn build_null_buffer(
    decoder: &TupleDecoder,
    tuples: &[&[u8]],
    col_idx: usize,
) -> Result<(NullBuffer, usize), StrictError> {
    let n = tuples.len();
    let mut validity = Vec::with_capacity(n);
    let mut null_count = 0;

    for tuple in tuples {
        let is_null = decoder.is_null(tuple, col_idx)?;
        validity.push(!is_null);
        if is_null {
            null_count += 1;
        }
    }

    Ok((NullBuffer::new(BooleanBuffer::from(validity)), null_count))
}

fn extract_int64(
    decoder: &TupleDecoder,