Struct GraphView 

pub struct GraphView<'a> {
    pub ids: &'a IdMap,
    pub syms: &'a Interner,
    pub labels: &'a [u32],
    pub props: ColumnsView<'a>,
    pub topo: TopologyView<'a>,
    pub edge_props: EdgePropsView<'a>,
    pub mask: Option<&'a HashSet<u32>>,
    pub prop_index: Option<&'a PropertyIndex>,
}

Read-only twin of GraphMut. Holds only borrowed graph state.

Fields

ids: &'a IdMap

syms: &'a Interner

labels: &'a [u32]

props: ColumnsView<'a>

Overlay-over-base column store view. For V5–V7 snapshots and fresh databases, base is None and all column reads go to the overlay. For V8 snapshots, base holds the archived columns from the mmap.

topo: TopologyView<'a>

Overlay-over-base topology view. For V5–V7 snapshots and fresh databases, base is None and all topology reads go to the owned overlay. For V8 snapshots, base holds the archived CSR from the mmap, and WAL-replayed edges accumulate in the overlay.

edge_props: EdgePropsView<'a>

Overlay-over-base edge-property view. For V8 snapshots the base section is consulted zero-copy; the overlay holds only post-snapshot changes. Tombstones in the overlay mask deleted-from-base entries.

mask: Option<&'a HashSet<u32>>

Optional query-scoped node visibility set. None = all nodes visible. When Some(set), only dense ids present in set are accessible.

prop_index: Option<&'a PropertyIndex>

Optional equality index over scalar properties. Some on the primary locked read path; None for MVCC reader snapshots (which fall back to a scan). IndexScan consults it only when the (label, field) is declared.

Implementations

impl<'a> GraphView<'a>

pub fn visible(&self, id: u32) -> bool

Returns true if id is visible under the current mask. Always true when no mask is set.

pub fn node_id(&self, key: &str) -> Option<u32>

pub fn key_of(&self, id: u32) -> &str

pub fn label_of(&self, id: u32) -> Option<&str>

pub fn nodes_with_prop( &self, label: &str, field: &str, value: &Value, ) -> Option<Vec<u32>>

Indexed lookup of node ids of label whose scalar field equals value, filtered by the active mask. Returns None when no equality index covers (label, field) (the caller should fall back to a scan); Some(ids) — possibly empty — when the index answers the query.

pub fn nodes_with_label(&self, label: &str) -> Vec<u32>

pub fn nodes_all(&self) -> Vec<u32>

All non-tombstoned node ids regardless of label.

Respects the query-scoped mask: when a mask is active only ids present in the mask are returned, consistent with every other node accessor.

pub fn prop(&self, id: u32, field: &str) -> Option<ValueRef<'_>>

Look up the property field for node id.

Returns ValueRef::Borrowed for overlay hits (zero allocation) and ValueRef::Owned for base-section hits (value materialised from archived data). Returns None when neither overlay nor base has a value for (id, field).