Struct ColumnDate 

pub struct ColumnDate { /* private fields */ }

Column for Date type (stored as UInt16 - days since Unix epoch 1970-01-01)

Range: 1970-01-01 to 2149-06-06

ClickHouse Reference: https://clickhouse.com/docs/en/sql-reference/data-types/date

C++ Implementation Pattern: Uses delegation to ColumnUInt16 for storage, matching the C++ clickhouse-cpp reference implementation’s std::shared_ptr<ColumnUInt16> data_ pattern.

Implementations

impl ColumnDate

pub fn new(type_: Type) -> Self

Creates a new empty Date column with the given type.

pub fn with_data(self, data: Vec<u16>) -> Self

Returns a new column populated with the given days-since-epoch values.

pub fn append(&mut self, days: u16)

Append days since epoch (raw UInt16 value)

pub fn append_timestamp(&mut self, timestamp: i64)

Append from Unix timestamp (seconds since epoch)

pub fn at(&self, index: usize) -> u16

Get raw days value at index

pub fn timestamp_at(&self, index: usize) -> i64

Get Unix timestamp (seconds) at index

pub fn len(&self) -> usize

Returns the number of elements in the column.

pub fn is_empty(&self) -> bool

Returns true if the column contains no elements.

pub fn data(&self) -> &ColumnUInt16

Get reference to underlying data column (for advanced use)

Trait Implementations

impl Column for ColumnDate

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_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.

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.