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Nebula Graph Database Manual

vesoft-inc/nebula-docs

About
Introduction
Introduction
- What is Nebula Graph
- Data model
- Nebula Graph architecture
  Nebula Graph architecture
Quick start
Quick start
nGQL guide
nGQL guide
- nGQL overview
  nGQL overview
  - Overview
  - Graph patterns
- Data types
  Data types
  - Numeric
  - Boolean
  - String
  - Date and time
  - NULL
  - List
  - Set
  - Map
  - Type conversion
- Variables and composite queries
  Variables and composite queries
- Operators
  Operators
  - Comparison
  - Boolean
  - Pipe
  - Property reference
  - Set
  - String
  - List
  - Precedence
- Functions and expressions
  Functions and expressions
  - Math functions
  - String functions
  - Date and time functions
  - Schema functions
  - Case expressions
  - List functions
  - count()
  - collect()
  - reduce()
  - hash()
  - Predicate functions
  - User-defined functions User-defined functions
    Table of contents
    
    OpenCypher compatibility
- General queries statements
  General queries statements
  - Match
  - LOOKUP
  - GO
  - FETCH
  - UNWIND
  - SHOW
    SHOW
    
    SHOW CHARSET
    
    SHOW COLLATION
    
    SHOW CREATE SPACE
    
    SHOW CREATE TAGS/EDGES
    
    SHOW HOSTS
    
    SHOW INDEX STATUS
    
    SHOW INDEXES
    
    SHOW PARTS
    
    SHOW ROLES
    
    SHOW SNAPSHOTS
    
    SHOW SPACES
    
    SHOW STATS
    
    SHOW TAGS/EDGES
    
    SHOW USERS
- Clauses and options
  Clauses and options
  - GROUP BY
  - LIMIT and SKIP
  - ORDER BY
  - RETURN
  - TTL
  - WHERE
  - YIELD
  - WITH
- Space statements
  Space statements
- Tag statements
  Tag statements
- Edge type statements
  Edge type statements
- Vertex statements
  Vertex statements
- Edge statements
  Edge statements
- Native index statements
  Native index statements
- Full-text index statements
  Full-text index statements
- Subgraph and path
  Subgraph and path
  - GET SUBGRAPH
  - FIND PATH
- Query tuning statements
  Query tuning statements
  - EXPLAIN and PROFILE
- Operation and maintenance statements
  Operation and maintenance statements
  - BALANCE syntax
  - Job statements
- Appendix
  Appendix
Deployment and installation
Deployment and installation
- Resource preparations
- Compile and install Nebula Graph
  Compile and install Nebula Graph
  - Install Nebula Graph by compiling the source code
  - Install Nebula Graph with RPM or DEB package
- Deploy Nebula Graph cluster
- Upgrade Nebula Graph
Configurations and logs
Configurations and logs
- Configurations
  Configurations
- Log management
  Log management
  - Logs
Monitor and metrics
Monitor and metrics
- Query Nebula Graph metrics
Data security
Data security
- Authentication and authorization
  Authentication and authorization
- Backup & Restore
  Backup & Restore
- Manage snapshots
Service Tuning
Service Tuning
- Compaction
- Storage load balance
Contribution
Contribution
- How to Contribute
中文手册
PDF

User-defined functions¶

OpenCypher compatibility¶

User-defined functions are not yet supported nor designed in Nebula Graph 2.x.

Last update: March 17, 2021