Struct ColumnNullableT 

pub struct ColumnNullableT<T: Column> { /* private fields */ }

Typed nullable column wrapper (matches C++ ColumnNullableT)

Provides typed access to nullable columns with methods that work with Option<T> instead of raw column operations.

Implementations

impl<T: Column + 'static> ColumnNullableT<T>

pub fn from_parts(nested: Arc<T>, nulls: ColumnRef) -> Result<Self>

Create a new typed nullable column from parts

pub fn from_nested(nested: Arc<T>) -> Self

Create from nested column only (all non-null initially)

pub fn new(type_: Type) -> Self

Create with type

pub fn wrap(col: ColumnNullable) -> Self

Wrap a ColumnNullable (matches C++ Wrap)

pub fn wrap_ref(col: ColumnRef) -> Result<Self>

Wrap from ColumnRef

pub fn typed_nested(&self) -> Result<Arc<T>>

Get the typed nested column

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

Check if value at index is null

pub fn inner(&self) -> &ColumnNullable

Get the inner ColumnNullable

pub fn inner_mut(&mut self) -> &mut ColumnNullable

Get mutable inner ColumnNullable

pub fn len(&self) -> usize

Get size

pub fn is_empty(&self) -> bool

Check if empty

Trait Implementations

impl<T: Column + 'static> Column for ColumnNullableT<T>

fn column_type(&self) -> &Type

Get the type of this column

fn size(&self) -> usize

Get the number of rows in this column

fn clear(&mut self)

Clear all data from the column

fn reserve(&mut self, new_cap: usize)

Reserve capacity for at least new_cap elements

fn append_column(&mut self, other: ColumnRef) -> Result<()>

Append another column’s data to this column

fn load_from_buffer(&mut self, buffer: &mut &[u8], rows: usize) -> Result<()>

Load column data from byte buffer

fn save_prefix(&self, buffer: &mut BytesMut) -> Result<()>

Save column prefix to byte buffer (for types that need prefix data) Default implementation is a no-op. Override for types like LowCardinality, Array with special nested types. This matches C++ clickhouse-cpp’s SavePrefix pattern.

fn save_to_buffer(&self, buffer: &mut BytesMut) -> Result<()>

Save column data to byte buffer

fn clone_empty(&self) -> ColumnRef

Create an empty clone of this column (same type, no data)

fn slice(&self, begin: usize, len: usize) -> Result<ColumnRef>

Create a slice of this column

fn as_any(&self) -> &dyn Any

Downcast to a concrete column type

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

Downcast to a mutable concrete column type

fn load_prefix(&mut self, _buffer: &mut &[u8], _rows: usize) -> Result<()>

Load column prefix from byte buffer (for types that need prefix data) Default implementation is a no-op. Override for types like LowCardinality. This matches C++ clickhouse-cpp’s LoadPrefix pattern.