CoordiNode

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CoordiNode Roadmap ​

Public roadmap in Now / Next / Later format.

For feature requests and bug reports, use GitHub Issues.

Now (v0.5.x, current release) ​

These features are implemented, tested, and available today.

Query Engine

  • OpenCypher read + write (MATCH, CREATE, MERGE, DELETE, SET, REMOVE, WITH, UNWIND, OPTIONAL MATCH)
  • Variable-length path queries (*1..N), shortest path
  • Aggregation (count, sum, avg, min, max, collect, percentile)
  • MVCC transactions with Snapshot Isolation and optimistic conflict detection
  • Time-travel queries (AS OF TIMESTAMP, 7-day retention)
  • EXPLAIN with cost estimation

Vector Search

  • HNSW index up to 65,536 dimensions
  • SQ8 scalar quantization (4x memory reduction) and RaBitQ binary codes with exact rerank
  • Distance metrics: cosine, L2, dot product, L1
  • Vector search over relationship properties as well as node properties
  • Hybrid graph traversal + vector filter in a single query
  • maxsim_score() for ColBERT-style late-interaction relevance

Full-Text Search

  • BM25 scoring with fuzzy, phrase, and wildcard queries
  • 23+ built-in languages (Snowball stemmers)
  • CJK support (Chinese, Japanese, Korean) via feature flags
  • Per-field analyzer configuration

Spatial

  • point({latitude, longitude}) constructor
  • point.distance() with Haversine formula
  • Spatial predicates in WHERE clauses

Document Properties

  • Nested DOCUMENT type (arbitrary JSON/MessagePack depth)
  • Dot-notation property access (n.config.network.ssid)
  • Three schema modes: STRICT, VALIDATED, FLEXIBLE

Indexes

  • B-tree: single-field, compound, unique, partial, sparse
  • TTL index with automatic background expiration
  • Online index build (zero-downtime)

Security

  • Searchable symmetric encryption (AES-256-GCM + HMAC-SHA256)
  • Equality search on encrypted fields

Operations

  • Built-in query advisor: EXPLAIN SUGGEST with 5 detectors + N+1 pattern detection
  • Prometheus metrics, structured JSON logging, OTLP tracing
  • Backup/restore (JSON, Cypher, binary formats)
  • Docker image, embedded library mode (coordinode-embed)

Document Operations

  • Path-targeted partial updates (SET n.config.ssid = "home" without read-modify-write)
  • Array operators (push, pull, addToSet, increment) as merge operands
  • Graph-document transformations: DETACH DOCUMENT promotes a nested property to a node and edge, ATTACH DOCUMENT demotes it back

Schema and Index DDL

  • CREATE LABEL with typed properties, CREATE EDGE TYPE, and CREATE VECTOR INDEX ... OPTIONS {m, ef_construction} as Cypher statements
  • CREATE ENCRYPTED INDEX with encrypted_match() in WHERE

Entity Resolution

  • MERGE NODES (a, b) INTO a collapses duplicates in one MVCC transaction, with property merge rules, edge re-pointing and duplicate-edge handling

Triggers

  • CREATE / DROP / SHOW / ALTER TRIGGER as first-class clauses, replicated through Raft, with cascade limits and per-trigger error policy

Temporal

  • Bitemporal edge types: multiple (valid_from, valid_to) versions per pair, with time-slice predicates pushed into the scan

Replication and Cluster

  • Multi-node Raft replication with leader election, snapshot transfer and log compaction, included in the open-source edition
  • Follower reads with staleness tracking, and causal-consistency sessions
  • Mutual TLS between nodes over a pure-Rust stack, with zstd compression on the replication transport
  • Background scrub, with damaged segments rebuilt from a healthy replica
  • Fault-injection test suite: partition matrix, crash and clock skew, linearizability checking over a live workload

API

  • gRPC on port 7080 (native, all services)
  • REST/JSON via gRPC-to-REST transcoding (port 7081, via structured-proxy)
  • Operational HTTP on port 7084 (/metrics, /health, /ready)
  • Parameter binding in gRPC/REST queries

Next ​

Features in active development or planned for the next few releases. When a feature is completed, the corresponding documentation will be updated.

GraphQL API

  • GraphQL with auto-generated schema from graph model (SDL generation implemented, server wiring in progress)
    • Closes: COMPATIBILITY.md "GraphQL → Planned"

WebSocket Subscriptions

  • Live query subscriptions via WebSocket (port 7083)
    • Closes: COMPATIBILITY.md "WebSocket → Planned"

Trigger Firing

  • BEFORE and AFTER COMMIT execution for the trigger definitions the DDL already accepts
  • Static cycle detection at definition time, and an auto-disable circuit breaker

Late-Interaction Retrieval

  • Centroid-based candidate selection for maxsim_score(), replacing the brute-force pass over candidates

SQL

  • PostgreSQL wire protocol over the same query IR, so SQL and Cypher reach one engine and one transaction model

Later ​

Long-term vision. Timeline depends on community interest and sponsorship.

Neo4j Compatibility

  • Bolt protocol (v4.3–v5.8) — existing Neo4j drivers connect without code changes
  • 130+ OpenCypher functions (string, math, temporal, list, map)
  • Neo4j procedures (db.*, dbms.*)
  • LOAD CSV, neo4j-admin import compatibility
  • Constraints (node key, existence, property type)

Horizontal Scaling (Enterprise Edition)

  • Multi-group Raft with hash/range sharding
  • CRUSH-like placement with failure domain awareness
  • Scatter-gather query engine with predicate push-down
  • Cross-shard 2PC transactions with HLC timestamps
  • Erasure coding for storage efficiency

Advanced Features

  • CDC (Change Data Capture) to NATS, Kafka, webhooks
  • Materialized graph views with incremental refresh
  • Graph analytics (PageRank, community detection, centrality)
  • Visual graph explorer (Vue 3 + WebGL)
  • Kubernetes operator with rolling upgrades
  • Multi-tenancy with mClock QoS per tenant

Contributing ​

We welcome contributions at any level — from bug reports to feature implementations.

See CONTRIBUTING.md for guidelines.