Function hash_struct_array

datafusion/common/src/hash_utils.rs:542–568

(
    array: &StructArray,
    random_state: &RandomState,
    hashes_buffer: &mut [u64],
)

#[cfg(not(feature = "force_hash_collisions"))]
fn hash_struct_array(
    array: &StructArray,
    random_state: &RandomState,
    hashes_buffer: &mut [u64],
) -> Result<()> {
    let nulls = array.nulls();
    let row_len = array.len();

    // Create hashes for each row that combines the hashes over all the column at that row.
    let mut values_hashes = vec![0u64; row_len];
    create_hashes(array.columns(), random_state, &mut values_hashes)?;

    // Separate paths to avoid allocating Vec when there are no nulls
    if let Some(nulls) = nulls {
        for i in nulls.valid_indices() {
            let hash = &mut hashes_buffer[i];
            *hash = combine_hashes(*hash, values_hashes[i]);
        }
    } else {
        for i in 0..row_len {
            let hash = &mut hashes_buffer[i];
            *hash = combine_hashes(*hash, values_hashes[i]);
        }
    }

    Ok(())
}

// only adding this `cfg` b/c this function is only used with this `cfg`
#[cfg(not(feature = "force_hash_collisions"))]