arrow_array::array

Type Alias Int32DictionaryArray

Source
pub type Int32DictionaryArray = DictionaryArray<Int32Type>;
Expand description

A DictionaryArray indexed by i32

§Example: Using collect


let array: Int32DictionaryArray = vec!["a", "a", "b", "c"].into_iter().collect();
let values: Arc<dyn Array> = Arc::new(StringArray::from(vec!["a", "b", "c"]));
assert_eq!(array.keys(), &Int32Array::from(vec![0, 0, 1, 2]));
assert_eq!(array.values(), &values);

See DictionaryArray for more information and examples

Aliased Type§

struct Int32DictionaryArray {
    data_type: DataType,
    keys: PrimitiveArray<Int32Type>,
    values: Arc<dyn Array>,
    is_ordered: bool,
}

Fields§

§data_type: DataType§keys: PrimitiveArray<Int32Type>

The keys of this dictionary. These are constructed from the buffer and null bitmap of data. Also, note that these do not correspond to the true values of this array. Rather, they map to the real values.

§values: Arc<dyn Array>

Array of dictionary values (can by any DataType).

§is_ordered: bool

Values are ordered.