Struct Column

pub struct Column { /* private fields */ }

A single column in a table.

Implementations

impl Column

pub fn try_from_slice<T>(slice: &[T::Native]) -> Result<Self>

where T: ArrowPrimitiveType,

Converts a slice into a Column.

Errors

Returns an error if array operation failed.

pub fn primitive_try_get<T>( &self, index: usize, ) -> Result<Option<T::Native>, TypeError>

where T: ArrowPrimitiveType,

Return the value specified by the index as type T

Errors

Returns an error if it’s fail to convert the value to the specified type

pub fn binary_try_get(&self, index: usize) -> Result<Option<&[u8]>, TypeError>

Return the value specified by the index as byte array

Errors

Returns an error if it’s fail to convert the value to byte array

pub fn string_try_get(&self, index: usize) -> Result<Option<&str>, TypeError>

Return the value specified by the index as string

Errors

Returns an error if it’s fail to convert the value to string

pub fn iter<'a, T>(&'a self) -> Result<Flatten<IntoIter<&'a T>>, TypeError>

where T: Array + 'static, &'a T: IntoIterator,

Creates an iterator iterating over all the cells in this Column.

Errors

Returns an error if the type parameter does not match with the type of this Column.

pub fn primitive_iter<'a, 'b, T>( &'a self, selected: &'b [usize], ) -> Result<PrimitiveIter<'a, 'b, T>, TypeError>

where T: ArrowPrimitiveType,

Creates an iterator iterating over a subset of the cells in this Column of primitive type, designated by selected.

Errors

Returns an error if the type parameter does not match with the type of this Column.

pub fn binary_iter<'a, 'b>( &'a self, selected: &'b [usize], ) -> Result<BinaryIter<'a, 'b>, TypeError>

Creates an iterator iterating over a subset of the cells in this Column of binaries, designated by selected.

Errors

Returns an error if the type parameter does not match with the type of this Column.

pub fn string_iter<'a, 'b>( &'a self, selected: &'b [usize], ) -> Result<StringIter<'a, 'b>, TypeError>

Creates an iterator iterating over a subset of the cells in this Column of strings, designated by selected.

Errors

Returns an error if the type parameter does not match with the type of this Column.

Trait Implementations

impl Clone for Column

fn clone(&self) -> Column

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Column

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

Formats the value using the given formatter.

impl Default for Column

fn default() -> Column

Returns the “default value” for a type.

impl From<Arc<dyn Array>> for Column

fn from(array: Arc<dyn Array>) -> Self

Converts to this type from the input type.

impl PartialEq for Column

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

Tests for self and other values to be equal, and is used by ==.

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

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