OpenCypher Reference
CoordiNode implements a subset of OpenCypher with its own extensions for vector search, full-text search, spatial queries, document operations, and time-travel reads.
Implementation status convention
Throughout this reference, every feature is marked with its current status:
| Badge | Meaning |
|---|---|
| ✅ Supported | Works in this release |
| 🔷 Extension | CoordiNode-specific, not in standard OpenCypher |
| 📋 Planned | Parsed / in the roadmap, not yet functional |
Functions returning null
Several standard OpenCypher functions (toInteger, toLower, length, abs, etc.) parse without error but return null in this release. Using them silently produces wrong results — check the Functions reference for the current list.
Navigation
- Language Reference — Clauses, operators, data types, patterns
- Functions — All scalar, aggregation, and extension functions with status
- Extensions — Vector search, full-text, spatial, document ops, time-travel
- Temporal edges (bitemporal) —
CREATE EDGE TYPE … TEMPORAL, point-in-time and window queries - Node identity —
elementId()vsid(), encoding, stability guarantees - Neo4j Compatibility — What works with Neo4j tooling and what doesn't
Quick Example
cypher
-- Graph traversal + vector similarity in one query
MATCH (topic:Concept {name: $topic})-[:RELATED_TO*1..2]->(related)
MATCH (related)<-[:ABOUT]-(doc:Document)
WHERE vector_similarity(doc.embedding, $query_vec) > 0.7
AND text_match(doc.body, $keywords)
RETURN doc.title,
vector_similarity(doc.embedding, $query_vec) AS semantic,
text_score(doc.body, $keywords) AS relevance
ORDER BY semantic DESC
LIMIT 10What's in This Release
| Area | Status |
|---|---|
| Read clauses (MATCH, RETURN, WITH, UNWIND, ORDER BY, SKIP, LIMIT) | ✅ |
| Write clauses (CREATE, MERGE, DELETE, DETACH DELETE, SET, REMOVE) | ✅ |
| UPSERT MATCH (atomic upsert) | 🔷 |
| MERGE NODES (entity-resolution / dedup, replaces APOC) | ✅ 🔷 |
| Native triggers — CREATE/DROP/SHOW/ALTER TRIGGER DDL + ON ERROR + cycle protection (firing in v0.4.x) | ✅ 🔷 |
Variable-length paths *min..max | ✅ |
| Pattern predicates in WHERE | ✅ |
| CASE WHEN expressions | ✅ |
Map projections n { .prop, alias: expr } | ✅ |
| Aggregations (count, sum, avg, min, max, collect, stDev, percentile) | ✅ |
| Index DDL (CREATE/DROP INDEX, VECTOR INDEX, TEXT INDEX, ENCRYPTED INDEX) | ✅ |
| Vector functions (vector_distance, vector_similarity, vector_dot) | ✅ 🔷 |
| Full-text functions (text_match, text_score) | ✅ 🔷 |
| Spatial functions (point, point.distance) | ✅ 🔷 |
| Document operations (doc_push, doc_pull, doc_add_to_set, doc_inc) | ✅ 🔷 |
| AS OF TIMESTAMP time-travel reads | ✅ 🔷 |
| EXPLAIN / EXPLAIN SUGGEST | ✅ 🔷 |
| CALL procedure YIELD (dbms.procedures, dbms.functions, db.advisor.*) | ✅ |
| Bolt protocol (Neo4j wire) | 📋 v1.2 |
LOAD CSV (use coordinode-import instead) | ❌ |
| FOREACH | ✅ |
| Scalar functions (toInteger, toLower, length, abs, …) | ✅ |