Function make_array_inner

datafusion/functions-nested/src/make_array.rs:132–149

`make_array_inner` is the implementation of the `make_array` function. Constructs an array using the input `data` as `ArrayRef`. Returns a reference-counted `Array` instance result.

(arrays: &[ArrayRef])

/// Constructs an array using the input `data` as `ArrayRef`.
/// Returns a reference-counted `Array` instance result.
pub(crate) fn make_array_inner(arrays: &[ArrayRef]) -> Result<ArrayRef> {
    let data_type = arrays.iter().find_map(|arg| {
        let arg_type = arg.data_type();
        (!arg_type.is_null()).then_some(arg_type)
    });

    let data_type = data_type.unwrap_or(&Null);
    if data_type.is_null() {
        // Either an empty array or all nulls:
        let length = arrays.iter().map(|a| a.len()).sum();
        let array = new_null_array(&Null, length);
        Ok(Arc::new(
            SingleRowListArrayBuilder::new(array).build_list_array(),
        ))
    } else {
        array_array::<i32>(arrays, data_type.clone(), Field::LIST_FIELD_DEFAULT_NAME)
    }
}

/// Convert one or more [`ArrayRef`] of the same type into a
/// `ListArray` or 'LargeListArray' depending on the offset size.