Struct ColumnTuple 

pub struct ColumnTuple { /* private fields */ }

Column for tuple types (fixed number of heterogeneous columns).

Implementations

impl ColumnTuple

pub fn new(type_: Type, columns: Vec<ColumnRef>) -> Self

Create a new tuple column with the given type and element columns.

pub fn column_count(&self) -> usize

Get the number of columns in the tuple

pub fn column_at(&self, index: usize) -> ColumnRef

Get a reference to a specific column in the tuple

pub fn column_at_mut(&mut self, index: usize) -> &mut dyn Column

Get mutable reference to a specific column (for appending)

pub fn len(&self) -> usize

Get the number of elements (rows) - all columns should have the same size

pub fn is_empty(&self) -> bool

Check if the tuple column is empty

Trait Implementations

impl Column for ColumnTuple

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_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.

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