Struct GraphStore 

pub struct GraphStore {
    pub registry: Arc<LabelRegistry>,
    /* private fields */
}

High-performance graph storage engine

Provides concurrent read access with minimal locking overhead. Writes are serialized through a write lock but reads can proceed in parallel.

Fields

registry: Arc<LabelRegistry>

Dynamic label catalog. Resolves user-supplied label strings to stable LabelId u32 values used in the v2 page format.

Implementations

impl GraphStore

pub fn new() -> Self

Create a new empty graph store with a fresh LabelRegistry that has the legacy reserved label IDs (1..=19) pre-seeded so v1 on-disk graph records still decode round-trip.

pub fn with_registry(registry: Arc<LabelRegistry>) -> Self

Create an empty graph store sharing the given LabelRegistry. Use this when multiple GraphStore instances should agree on LabelId assignments (e.g. when the same database holds several named graphs).

pub fn intern_node_label(&self, label: &str) -> Result<LabelId, GraphStoreError>

Intern an arbitrary node label string. Convenience wrapper over LabelRegistry::intern; the returned LabelId can be passed to the upcoming label-id-aware insert APIs (PR3).

pub fn intern_edge_label(&self, label: &str) -> Result<LabelId, GraphStoreError>

Intern an arbitrary edge label string.

pub fn publish_indexes(&self, registry: &IndexRegistry, collection: &str)

Publish this graph’s secondary index into an external IndexRegistry. The registry holds an Arc pointing to the same live index, so planners consulting the registry see current stats without any copy/refresh logic.

Scope: IndexScope::graph(collection). Idempotent — subsequent calls replace the previous entry.

pub fn add_node_with_label( &self, id: &str, display_label: &str, category: &str, ) -> Result<RecordLocation, GraphStoreError>

Add a node using a category label string. Interns category into the LabelRegistry and writes the node in v2 format.

pub fn add_edge_with_label( &self, source_id: &str, target_id: &str, category: &str, weight: f32, ) -> Result<RecordLocation, GraphStoreError>

Add an edge using a category label string.

pub fn add_node_linked( &self, id: &str, label: &str, category: &str, table_id: u16, row_id: u64, ) -> Result<RecordLocation, GraphStoreError>

Add a node linked to a table row (for unified queries).

pub fn get_node_table_ref(&self, node_id: &str) -> Option<TableRef>

Get table reference for a node (if linked)

pub fn get_node(&self, id: &str) -> Option<StoredNode>

Get a node by ID (lock-free read)

pub fn outgoing_edges(&self, source_id: &str) -> Vec<(String, String, f32)>

Get all outgoing edges from a node (edge_label, target, weight).

pub fn incoming_edges(&self, target_id: &str) -> Vec<(String, String, f32)>

Get all incoming edges to a node (edge_label, source, weight).

pub fn outgoing_of_type( &self, source_id: &str, edge_label: &str, ) -> Vec<(String, f32)>

Get outgoing edges of a specific label.

pub fn has_node(&self, id: &str) -> bool

Check if a node exists

pub fn node_count(&self) -> u64

Get node count

pub fn edge_count(&self) -> u64

Get edge count

pub fn iter_nodes(&self) -> NodeIterator<'_>

Iterate over all nodes (streaming)

pub fn iter_all_edges(&self) -> Vec<StoredEdge>

Iterate all edges in the graph

This collects outgoing edges from all nodes to build a complete edge list. Returns StoredEdge structs with source, target, type, and weight.

pub fn nodes_of_label(&self, label_id: LabelId) -> Vec<StoredNode>

Get nodes whose category resolves to label_id. O(k) via secondary index plus one fetch per id.

pub fn nodes_by_label(&self, label: &str) -> Vec<StoredNode>

Get nodes with a given label. Backed by the secondary inverted index (label → node_id set) with a bloom-filter pre-check for absent labels.

pub fn nodes_with_category(&self, category: &str) -> Vec<StoredNode>

Get nodes whose category label (as registered in the LabelRegistry) matches the given string. Replaces the enum-typed [nodes_of_type] for callers that work with arbitrary user-defined labels.

O(k) lookup via secondary index keyed by LabelId.

pub fn may_contain_label(&self, label: &str) -> bool

Returns true iff the label is possibly present. Bloom-backed fast path for planners that want to skip a traversal without paying the set lookup cost.

pub fn node_secondary_index(&self) -> &NodeSecondaryIndex

Read-only handle to the secondary index (for planner/diagnostics).

pub fn stats(&self) -> GraphStats

Get statistics

pub fn serialize(&self) -> Vec<u8>

Serialize to bytes for persistence (file format v2: includes the embedded LabelRegistry catalog right after the fixed header).

pub fn deserialize(data: &[u8]) -> Result<Self, GraphStoreError>

Deserialize from bytes. Dual-path: a v1 file (no embedded registry, 1-byte enum discriminants) is read with StoredNode::decode_v1 against a freshly-seeded legacy registry. A v2 file restores the registry from its embedded blob and decodes records via StoredNode::decode.

Trait Implementations

impl Default for GraphStore

fn default() -> Self

Returns the “default value” for a type.