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Nebula Graph Database Manual

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About
Introduction
Introduction
- What is Nebula Graph
- Data model
- Path
- VID
- Nebula Graph architecture
  Nebula Graph architecture
Quick start
Quick start
nGQL guide
nGQL guide
- nGQL overview
  nGQL overview
- 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
- 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
    
    SHOW SESSIONS
    
    SHOW QUERIES
- 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
Deployment and installation
Deployment and installation
- Resource preparations
- Compile and install Nebula Graph
  Compile and install Nebula Graph
- Manage Service
- Connect to Service
- Upgrade
  Upgrade
  - Upgrade Nebula Graph to v2.5.0
  - Upgrade Nebula Graph from v2.0.x to v2.5.0
- Uninstall 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
- Manage snapshots
Service Tuning
Service Tuning
Client
Client
Nebula Graph Studio
Nebula Graph Studio
- Change Log
- About Nebula Graph Studio
  About Nebula Graph Studio
- Deploy and connect
  Deploy and connect
- Quick start
  Quick start
- Operation guide
  Operation guide
  - Use Schema
    Use Schema
    
    Operate graph spaces
    
    Operate Tags
    
    Operate Edge types
    
    Operate Indexes
  - Use Console
    Use Console
    
    Console
    
    Open in Explore
    
    View subgraphs
- Troubleshooting
  Troubleshooting
Nebula Dashboard
Nebula Dashboard
Nebula Explorer
Nebula Explorer
- What is Nebula Explorer
- Deploy and connect
  Deploy and connect
- Operation guide
  Operation guide
Nebula Importer
Nebula Importer
Nebula Exchange
Nebula Exchange
- Introduction
  Introduction
  - What is Nebula Exchange
  - Limitations
- Compile Exchange
- Exchange configurations
  Exchange configurations
  - Options for import
  - Parameters in the configuration file
- Use Nebula Exchange
  Use Nebula Exchange
- Exchange FAQ
Nebula Algorithm
Nebula Spark Connector
Nebula Flink Connector
Nebula Bench
Appendix
Appendix
中文手册

Execution plan¶

Nebula Graph 2.5.0 applies rule-based execution plans. Users cannot change execution plans, precompile queries and corresponding plan cache, or accelerate queries by specifying indexes.

To view the execution plan and executive summary, see EXPLAIN and PROFILE.

Last update: September 2, 2021