Struct PatternTriple 

pub struct PatternTriple {
    pub start_label: Option<String>,
    pub edge_type: String,
    pub end_label: Option<String>,
    pub start_props: HashMap<String, String>,
    pub end_props: HashMap<String, String>,
    pub direction: BackendDirection,
}

A lightweight triple pattern for basic graph pattern matching.

Represents a single-hop pattern: (start_label)-[edge_type]->(end_label) with optional property filters on start and end nodes.

Fields

start_label: Option<String>

Optional label filter for the start node

edge_type: String

Edge type to match (required)

end_label: Option<String>

Optional label filter for the end node

start_props: HashMap<String, String>

Optional property filters for the start node (key -> value)

end_props: HashMap<String, String>

Optional property filters for the end node (key -> value)

direction: BackendDirection

Direction of the pattern (default: Outgoing)

Implementations

impl PatternTriple

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

Create a new pattern triple with the given edge type.

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

Set the start node label filter.

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

Set the end node label filter.

pub fn start_property( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Add a property filter for the start node.

pub fn end_property( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

Add a property filter for the end node.

pub fn direction(self, direction: BackendDirection) -> Self

Set the direction of the pattern.

pub fn validate(&self) -> Result<(), SqliteGraphError>

Validate that the pattern is well-formed.

Trait Implementations

impl Clone for PatternTriple

fn clone(&self) -> PatternTriple

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PatternTriple

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

Formats the value using the given formatter.

impl Default for PatternTriple

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for PatternTriple

fn eq(&self, other: &PatternTriple) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for PatternTriple

impl StructuralPartialEq for PatternTriple