Struct ColumnStore 

pub struct ColumnStore { /* private fields */ }

Per-field typed columns. Homogeneous Int/Float/Bool/Str use a dense vec plus presence bitmap; mixed-type fields and lists spill to a HashMap (slow path).

On-disk (V6) shape is still HashMap<String, HashMap<u32, Value>>.

Implementations

impl ColumnStore

pub fn new() -> Self

pub fn set(&mut self, node: u32, field: &str, value: Value)

pub fn get(&self, node: u32, field: &str) -> Option<&Value>

pub fn column(&self, field: &str) -> ColumnHandle<'_>

Return a pre-resolved column handle for field.

Hashes the field name once so that repeated ColumnHandle::get calls pay only the inner node-id lookup cost, not the outer string hash. Returns a handle that always returns None when the field is absent.

pub fn fields(&self) -> impl Iterator<Item = &str>

pub fn remove(&mut self, node: u32, field: &str) -> Option<Value>

Remove the value stored at (node, field) and return it, or None if absent. Prunes the column’s inner map entry when it becomes empty.

pub fn remove_all(&mut self, node: u32)

Drop every field stored for node. Idempotent: a node with no remaining props (or an id that was never written) is a no-op. Used by DeleteNode after rule retraction and user-edge sweep. Field iteration order is not observable — the resulting store is identical regardless of HashMap order.

pub fn record_prop_tombstone(&mut self, node: u32, field: &str)

Record that the base-only prop (node, field) was deleted via the WAL.

This tombstone is consulted by ColumnsView::get before falling through to the archived base section, ensuring that removed base props are not resurrected by base fallback reads. Consumed (cleared) at snapshot merge.

Trait Implementations

impl Clone for ColumnStore

fn clone(&self) -> ColumnStore

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnStore

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

Formats the value using the given formatter.

impl Default for ColumnStore

fn default() -> ColumnStore

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ColumnStore

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given Serde deserializer.

impl Serialize for ColumnStore

fn serialize<S: Serializer>(&self, serializer: S) -> Result<S::Ok, S::Error>

Serialize this value into the given Serde serializer.