图数据库Cypher生成

TuGraph Cypher query language reference guide. Use this skill when the user writes Cypher queries for TuGraph, creates schemas (vertex/edge labels), calls built-in procedures (db.*, dbms.*, algo.*), manages indexes, users, roles, subgraphs, or encounters OpenCypher features that TuGraph does not support. Covers operators, clauses, functions, procedures, and a compatibility matrix with standard OpenCypher.

TuGraph Cypher Skill

When working with TuGraph Cypher, follow these guidelines:

Core Architecture Differences

| Feature | TuGraph | Standard OpenCypher | |---------|---------|---------------------| | Label count | Must have exactly 1 label per node/edge | 0 to many labels | | Schema | Strong Schema (define before use) | Schema-less | | Label-less nodes | Cannot create, will error | Can create |

Unsupported Features Quick Reference

These OpenCypher features are NOT supported in TuGraph:

RETURN * — cannot return all variables
WHERE (a)-[]->(b) — path pattern filtering in WHERE
node["prop"] — dynamic property access
CREATE p = (a)-[:R]->(b) — creating full paths
CALL proc($param) — parameterized procedure arguments
SKIP rand() — SKIP/LIMIT expressions (constants only)
`VAR NAME` — backtick variable names
all(), any(), single(), none() — predicate functions
UNION (dedup) — only UNION ALL is supported

Full Reference

For detailed examples, syntax, and complete procedure lists, read the reference files:

references/quick-reference.md — operators, clauses, functions with examples
references/procedures.md — all built-in procedures with signatures

Version

Based on TuGraph DB 4.5.1. Features may change in newer versions.