Enum PromotePattern 

#[non_exhaustive]
pub enum PromotePattern {
    Vertex {
        label: String,
        where_clause: Option<String>,
    },
    Edge {
        edge_type: String,
        where_clause: Option<String>,
    },
}

Selector for Uni::promote_from_fork.

Two shapes:

• PromotePattern::label — match every vertex with this label; bulk-inserted on primary, deduplicated by content-derived UID.
• PromotePattern::edge_type — match every edge of this type whose endpoints already exist on primary; the edge is inserted between the resolved primary endpoints, deduplicated by (src_uid, dst_uid, edge_type).

Both variants accept an optional Cypher WHERE clause, interpolated verbatim into the fork-side scan. Callers are responsible for quoting and parameter safety.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Vertex

Promote vertices.

Fields

label: String

Vertex label.

where_clause: Option<String>

Optional WHERE predicate on the fork-side scan.

Edge

Promote edges. Endpoints must already exist on primary (by UID); fork-only endpoints are skipped and counted in PromoteReport::edges_skipped_no_endpoint.

Fields

edge_type: String

Edge type.

where_clause: Option<String>

Optional WHERE predicate on the fork-side scan. The bound names are a (source), r (edge), b (destination).

Implementations

impl PromotePattern

pub fn label(label: impl Into<String>) -> Self

Match every vertex with this label.

pub fn edge_type(edge_type: impl Into<String>) -> Self

Match every edge with this type. Endpoints must already exist on primary (resolved by UID); fork-only endpoints are counted and skipped — they need to be promoted first via a vertex pattern.

pub fn where_clause(self, expr: impl Into<String>) -> Self

Restrict the scan to rows matching this Cypher predicate. Verbatim interpolation — caller owns quoting.

pub fn label_name(&self) -> &str

Vertex label for vertex patterns. Empty string for edge patterns.

pub fn edge_type_name(&self) -> &str

Edge type for edge patterns. Empty string for vertex patterns.

pub fn where_expr(&self) -> Option<&str>

The optional WHERE predicate.

pub fn is_edge(&self) -> bool

true if this pattern targets edges.

Trait Implementations

impl Clone for PromotePattern

fn clone(&self) -> PromotePattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PromotePattern

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

Formats the value using the given formatter.

impl Display for PromotePattern

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

Formats the value using the given formatter.