Struct ColumnDateTime64 

pub struct ColumnDateTime64 { /* private fields */ }

Column for DateTime64 type (stored as Int64 - subsecond precision) Supports arbitrary sub-second precision, extended date range

C++ Implementation Pattern: C++ uses delegation to ColumnDecimal, but we use ColumnInt64 for simplicity since DateTime64 is fundamentally stored as Int64.

Implementations

impl ColumnDateTime64

pub fn new(type_: Type) -> Self

Creates a new empty DateTime64 column, extracting precision and timezone from the type.

pub fn with_data(self, data: Vec<i64>) -> Self

Returns a new column populated with the given sub-second timestamp values.

pub fn append(&mut self, value: i64)

Append timestamp with precision (e.g., for precision 3, value is milliseconds)

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

Get timestamp at index

pub fn precision(&self) -> usize

Get precision (0-9, number of decimal places)

pub fn timezone(&self) -> Option<&str>

Get timezone

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) -> &ColumnInt64

Get reference to underlying data column (for advanced use)

Trait Implementations

impl Column for ColumnDateTime64

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.