CQLite
An embedded graph database implemented in Rust. This is currently a pre-release. It has not been extensively tested with 'real-world work-loads', and the file-format and API are not yet stabilized.
The longer term goal is to create an in-process graph database with a stable on-disk format and support for a wide range of programming languages, providing a native Rust API, as well as a C FFI interface.
use cqlite::Graph;
let graph = Graph::open_anon()?;
let mut txn = graph.mut_txn()?;
let edge: u64 = graph.prepare(
"
CREATE (a:PERSON { name: 'Peter Parker' })
CREATE (b:PERSON { name: 'Clark Kent' })
CREATE (a) -[e:KNOWS]-> (b)
RETURN ID(e)
"
)?
.query_map(&mut txn, (), |m| m.get(0))?
.next()
.unwrap()?;
txn.commit()?;
let name: String = graph.prepare(
"
MATCH (p:PERSON) <-[e:KNOWS]- (:PERSON)
WHERE ID(e) = $edge
RETURN p.name
"
)?
.query_map(&mut graph.txn()?, ("edge", edge), |m| m.get(0))?
.next()
.unwrap()?;
assert_eq!("Clark Kent", name);
Architecture Overview
Parser :: src/parser
PEG grammar and parser for a subset of the CYPHER graph query language
Query Planner :: src/planner
Transforms a parsed query ast into a logical query plan. Performs some optimizations on the query plan.
Byte-Code Interpreter :: src/runtime
Defines a simple 'byte' code (Instructions) and can execute those against a given database, as well as generate instructions for a given query plan.
Storage Backend :: src/store
Uses a disc-backed btree to provide basic storage, iteration and lockup for nodes and edges.
1 Feb 20, 2022
172 Dec 26, 2022
1.3k Jan 2, 2023
1.4k Dec 29, 2022
12.4k Jan 3, 2023
19 Dec 2, 2021
78 Nov 27, 2022
32 Jul 25, 2022
38 Jan 2, 2024
16.9k Jan 8, 2023
116 Dec 27, 2022
2 Jan 6, 2022
3 May 19, 2023
8 May 27, 2023
11 Jun 3, 2021
145 Nov 23, 2022
6.6k Jan 8, 2023