Enum GraphMutation 

pub enum GraphMutation {
    PutNode(Node),
    PutEdge(Edge),
    DeleteEdge(EdgeId),
    DetachDeleteNode(NodeId),
}

A single mutation that can be combined with others into an atomic StorageEngine::apply_batch call. Backend-neutral: the enum only names what to do to the graph, not how the backend persists it. Lets callers commit a sequence of mutations as one atomic write — useful for giving multi-write Cypher queries crash-atomic local persistence.

Variants

PutNode(Node)

PutEdge(Edge)

DeleteEdge(EdgeId)

Idempotent within a batch: missing edges are skipped silently so a log replay that re-applies a partially-committed batch is safe.

DetachDeleteNode(NodeId)

Idempotent within a batch: missing nodes contribute no operations.

Trait Implementations

impl Clone for GraphMutation

fn clone(&self) -> GraphMutation

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphMutation

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

Formats the value using the given formatter.