Struct ColumnarSchema 

pub struct ColumnarSchema {
    pub columns: Vec<ColumnDef>,
    pub version: u32,
}

Schema for a columnar collection (compressed segment files).

Fields

columns: Vec<ColumnDef>

version: u32

Implementations

impl ColumnarSchema

pub fn new(columns: Vec<ColumnDef>) -> Result<Self, SchemaError>

pub fn is_bitemporal(&self) -> bool

Whether this schema has the reserved _ts_system bitemporal column.

Detected by column name rather than a separate flag to keep the on-disk manifest format unchanged; _ts_system is only inserted by prepend_bitemporal_columns on the write path, so its presence is a reliable bitemporal signal.

pub fn ts_system_idx(&self) -> Option<usize>

Position of the _ts_system column, or None for non-bitemporal.

Trait Implementations

impl Clone for ColumnarSchema

fn clone(&self) -> ColumnarSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnarSchema

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ColumnarSchema

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for ColumnarSchema

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl PartialEq for ColumnarSchema

fn eq(&self, other: &ColumnarSchema) -> 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.

impl SchemaOps for ColumnarSchema

fn columns(&self) -> &[ColumnDef]

fn column_index(&self, name: &str) -> Option<usize>

fn column(&self, name: &str) -> Option<&ColumnDef>

fn primary_key_columns(&self) -> Vec<&ColumnDef>

fn len(&self) -> usize

fn is_empty(&self) -> bool

impl Serialize for ColumnarSchema

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToMessagePack for ColumnarSchema

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

impl Eq for ColumnarSchema

impl StructuralPartialEq for ColumnarSchema