Method new_unchecked

arrow-array/src/array/union_array.rs:149–172

Creates a new `UnionArray`. Accepts type ids, child arrays and optionally offsets (for dense unions) to create a new `UnionArray`. This method makes no attempt to validate the data provided by the caller and assumes that each of the components are correct and consistent with each other. See `try_new` for an alternative that validates the data provided. # Safety The `type_ids` values should be

(
        fields: UnionFields,
        type_ids: ScalarBuffer<i8>,
        offsets: Option<ScalarBuffer<i32>>,
        children: Vec<ArrayRef>,
    )

    /// In both cases above we use signed integer types to maintain compatibility with other
    /// Arrow implementations.
    pub unsafe fn new_unchecked(
        fields: UnionFields,
        type_ids: ScalarBuffer<i8>,
        offsets: Option<ScalarBuffer<i32>>,
        children: Vec<ArrayRef>,
    ) -> Self {
        let mode = if offsets.is_some() {
            UnionMode::Dense
        } else {
            UnionMode::Sparse
        };

        let len = type_ids.len();
        let builder = ArrayData::builder(DataType::Union(fields, mode))
            .add_buffer(type_ids.into_inner())
            .child_data(children.into_iter().map(Array::into_data).collect())
            .len(len);

        let data = match offsets {
            Some(offsets) => unsafe { builder.add_buffer(offsets.into_inner()).build_unchecked() },
            None => unsafe { builder.build_unchecked() },
        };
        Self::from(data)
    }

    /// Attempts to create a new `UnionArray`, validating the inputs provided.
    ///