Struct polars_arrow::array::NullArray

pub struct NullArray { /* private fields */ }

The concrete Array of ArrowDataType::Null.

Implementations

impl NullArray

pub fn to_data(&self) -> ArrayData

Convert this array into arrow_data::ArrayData

pub fn from_data(data: &ArrayData) -> Self

Create this array from ArrayData

impl NullArray

pub fn try_new(data_type: ArrowDataType, length: usize) -> PolarsResult<Self>

Returns a new NullArray.

Errors

This function errors iff:

• The data_type’s crate::datatypes::PhysicalType is not equal to crate::datatypes::PhysicalType::Null.

pub fn new(data_type: ArrowDataType, length: usize) -> Self

Returns a new NullArray.

Panics

This function errors iff:

• The data_type’s crate::datatypes::PhysicalType is not equal to crate::datatypes::PhysicalType::Null.

pub fn new_empty(data_type: ArrowDataType) -> Self

Returns a new empty NullArray.

pub fn new_null(data_type: ArrowDataType, length: usize) -> Self

Returns a new NullArray.

pub fn sliced(self, offset: usize, length: usize) -> Self

Returns this array sliced.

Implementation

This function is O(1).

Panics

iff offset + length > self.len().

pub unsafe fn sliced_unchecked(self, offset: usize, length: usize) -> Self

Returns this array sliced.

Implementation

This function is O(1).

Safety

The caller must ensure that offset + length <= self.len().

pub fn boxed(self) -> Box<dyn Array>

Boxes this array into a Box<dyn Array>.

pub fn arced(self) -> Arc<dyn Array>

Arcs this array into a std::sync::Arc<dyn Array>.

impl NullArray

pub fn slice(&mut self, offset: usize, length: usize)

Returns a slice of the NullArray.

Panic

This function panics iff offset + length > self.len().

pub unsafe fn slice_unchecked(&mut self, _offset: usize, length: usize)

Returns a slice of the NullArray.

Safety

The caller must ensure that offset + length < self.len().

Trait Implementations

impl Array for NullArray

fn as_any(&self) -> &dyn Any

Converts itself to a reference of Any, which enables downcasting to concrete types.

fn as_any_mut(&mut self) -> &mut dyn Any

Converts itself to a mutable reference of Any, which enables mutable downcasting to concrete types.

fn len(&self) -> usize

The length of the Array. Every array has a length corresponding to the number of elements (slots).

fn data_type(&self) -> &ArrowDataType

The ArrowDataType of the Array. In combination with Array::as_any, this can be used to downcast trait objects (dyn Array) to concrete arrays.

fn slice(&mut self, offset: usize, length: usize)

Slices this Array.

unsafe fn slice_unchecked(&mut self, offset: usize, length: usize)

Slices the Array.

fn to_boxed(&self) -> Box<dyn Array>

Clone a &dyn Array to an owned Box<dyn Array>.

fn validity(&self) -> Option<&Bitmap>

The validity of the Array: every array has an optional Bitmap that, when available specifies whether the array slot is valid or not (null). When the validity is None, all slots are valid.

fn with_validity(&self, _: Option<Bitmap>) -> Box<dyn Array>

Clones this Array with a new new assigned bitmap.

fn is_empty(&self) -> bool

whether the array is empty

fn null_count(&self) -> usize

The number of null slots on this Array.

fn is_null(&self, i: usize) -> bool

Returns whether slot i is null.

unsafe fn is_null_unchecked(&self, i: usize) -> bool

Returns whether slot i is null.

fn is_valid(&self, i: usize) -> bool

Returns whether slot i is valid.

fn sliced(&self, offset: usize, length: usize) -> Box<dyn Array>

Returns a slice of this Array.

unsafe fn sliced_unchecked( &self, offset: usize, length: usize ) -> Box<dyn Array>

Returns a slice of this Array.

impl Clone for NullArray

fn clone(&self) -> NullArray

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NullArray

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<GrowableNull> for NullArray

fn from(val: GrowableNull) -> Self

Converts to this type from the input type.

impl From<MutableNullArray> for NullArray

fn from(value: MutableNullArray) -> Self

Converts to this type from the input type.

impl PartialEq<&(dyn Array + 'static)> for NullArray

fn eq(&self, other: &&dyn Array) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialEq for NullArray

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.