Enum GraphSpec 

pub enum GraphSpec {
    Expand {
        edge_types: Vec<String>,
        direction: EdgeDirection,
        filter_expr: Option<Expression>,
        col_names: Vec<String>,
        dst_tag: String,
    },
    ExpandAll {

        edge_types: Vec<String>,
        direction: EdgeDirection,
        filter_expr: Option<Expression>,
        col_names: Vec<String>,
        src_vids: Vec<Value>,
        step_limit: u32,
        step_limits: Option<Vec<u32>>,
        count_only: bool,
        emit_raw_ids: bool,
        lightweight_source: bool,
        path_semantic: Option<PathSemantic>,
        dst_tag: String,
        edge_required_props: Option<Vec<String>>,
        dst_required_props: Option<Vec<String>>,
        closed_loop: bool,
        skip_rows: bool,
        include_empty_paths: bool,
    
},
    Traverse {
        edge_types: Vec<String>,
        direction: EdgeDirection,
        min_depth: u32,
        max_depth: u32,
        filter_expr: Option<Expression>,
        path_semantic: Option<PathSemantic>,
        dst_tag: String,
    },
    BiExpand {
        edge_types: Vec<String>,
        direction: EdgeDirection,
        dst_tag: String,
    },
    BiTraverse {
        edge_types: Vec<String>,
        direction: EdgeDirection,
        min_depth: u32,
        max_depth: u32,
        dst_tag: String,
    },
}

Immutable config for graph traversal operators.

Variants

Expand

Fields

edge_types: Vec<String>

direction: EdgeDirection

filter_expr: Option<Expression>

col_names: Vec<String>

dst_tag: String

ExpandAll

Fields

edge_types: Vec<String>

direction: EdgeDirection

filter_expr: Option<Expression>

col_names: Vec<String>

src_vids: Vec<Value>

step_limit: u32

step_limits: Option<Vec<u32>>

count_only: bool

When true, the expand operator only counts output rows instead of materializing them. Used when the downstream is a simple COUNT(*) aggregate with no GROUP BY or other aggregation functions.

emit_raw_ids: bool

When true, emit Value::VertexId / Value::EdgeId instead of full Value::Vertex(Box) / Value::Edge(Box) in the expand output. Eliminates heap allocation for downstream operators that only need the identifier (e.g. another expand hop, count, join key).

lightweight_source: bool

When true (always alongside emit_raw_ids), the hop’s source column is also emitted as a Value::VertexId instead of cloning the full Value::Vertex(Box) carried in from upstream.

path_semantic: Option<PathSemantic>

dst_tag: String

edge_required_props: Option<Vec<String>>

Demanded edge properties (None means whole edge, empty means topology only). Drives storage projection pushdown.

dst_required_props: Option<Vec<String>>

Demanded destination properties, same encoding as the edge demand.

closed_loop: bool

Single-label closed loop proven by the planner syntactically and re-verified against storage at execution with row fallback.

skip_rows: bool

Rowless mode: skip the row view and emit typed columns only. Valid with empty demands or with bypassable property demands served as flat {var}.{prop} columns, always with a closed loop and a column-capable consumer.

include_empty_paths: bool

Whether seed vertices without any matching edge must still emit a row (edge and destination projected as NULL). Used for OPTIONAL MATCH.

Traverse

Fields

edge_types: Vec<String>

direction: EdgeDirection

min_depth: u32

max_depth: u32

filter_expr: Option<Expression>

path_semantic: Option<PathSemantic>

dst_tag: String

BiExpand

Fields

edge_types: Vec<String>

direction: EdgeDirection

dst_tag: String

BiTraverse

Fields

edge_types: Vec<String>

direction: EdgeDirection

min_depth: u32

max_depth: u32

dst_tag: String

Trait Implementations

impl Clone for GraphSpec

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for GraphSpec

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

Formats the value using the given formatter.