Crate graphqlite 

GraphQLite - SQLite extension for graph queries using Cypher

This crate provides Rust bindings for GraphQLite, allowing you to use Cypher graph queries in SQLite databases.

High-Level Graph API

The Graph struct provides an ergonomic interface for common graph operations:

use graphqlite::Graph;

let g = Graph::open(":memory:")?;

// Add nodes
g.upsert_node("alice", [("name", "Alice"), ("age", "30")], "Person")?;
g.upsert_node("bob", [("name", "Bob"), ("age", "25")], "Person")?;

// Add edge
g.upsert_edge("alice", "bob", [("since", "2020")], "KNOWS")?;

// Query
println!("{:?}", g.stats()?);
println!("{:?}", g.get_neighbors("alice")?);

// Graph algorithms
let ranks = g.pagerank(0.85, 20)?;
let communities = g.community_detection(10)?;

Low-Level Cypher API

The Connection struct provides direct Cypher query access:

use graphqlite::Connection;

let conn = Connection::open(":memory:")?;

// Create nodes
conn.cypher("CREATE (n:Person {name: 'Alice', age: 30})")?;

// Query the graph
let results = conn.cypher("MATCH (n:Person) RETURN n.name, n.age")?;
for row in &results {
    println!("{}: {}", row.get::<String>("n.name")?, row.get::<i64>("n.age")?);
}

Structs

AStarResult

A* shortest path result.

ApspResult

All pairs shortest path result for a single pair.

BetweennessCentralityResult

Betweenness centrality result for a single node.

BulkInsertResult

Result of a bulk insert operation.

CacheStatus

Cache operation status returned by load/unload/reload operations.

ClosenessCentralityResult

Closeness centrality result for a single node.

CommunityResult

Community detection result for a single node.

ComponentResult

Connected component result for a single node.

Connection

A GraphQLite database connection.

CypherQuery

A builder for constructing and executing parameterized Cypher queries.

CypherResult

Result of a Cypher query, containing zero or more rows.

DegreeCentralityResult

Degree centrality result for a single node.

EigenvectorCentralityResult

Eigenvector centrality result for a single node.

Graph

High-level graph operations.

GraphManager

Manager for multiple graph databases in a directory.

GraphStats

Graph statistics containing node and edge counts.

KnnResult

K-nearest neighbor result.

NodeSimilarityResult

Node similarity result using Jaccard coefficient.

PageRankResult

PageRank result for a single node.

Row

A single row from a Cypher query result.

ShortestPathResult

Shortest path result from Dijkstra’s algorithm.

TraversalResult

Traversal result for BFS/DFS.

TriangleCountResult

Triangle count result for a single node.

Enums

Error

Error type for GraphQLite operations.

Value

A dynamically-typed value returned from a Cypher query.

Statics

CYPHER_RESERVED

Cypher reserved keywords that can’t be used as relationship types.

Functions

escape_string

Escape a string for use in Cypher queries.

format_value

Format a value for inclusion in a Cypher query.

graph

Create a new Graph instance (convenience function).

graphs

Create a new GraphManager instance (convenience function).

sanitize_rel_type

Sanitize a relationship type for use in Cypher.

Type Aliases

Result

Result type for GraphQLite operations.