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Documentation Index

Fetch the complete documentation index at: https://docs.helix-db.com/llms.txt

Use this file to discover all available pages before exploring further.

HelixQL is deprecated in HelixDB v2. Queries are now written with the Rust DSL and dispatched as JSON — see the Querying guide. This section is kept as a reference for legacy HelixQL projects.
For the complete documentation index optimized for AI agents, see llms.txt.

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How do I define schemas in HelixDB?

Define the structure of your graph using HelixQL schema definitions. Every node, edge, and vector automatically includes an implicit ID field.

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Node schemas

Define node types and their properties: 
N::NodeType {
  field1: String,
  field2: U32
}

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Edge schemas

Define relationships between nodes with properties: 
E::EdgeType {
  From: NodeType,
  To: NodeType,
  Properties: {
    field1: String,
    field2: U32
  }
}

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Vector schemas

Define vector types with metadata properties: 
V::VectorType {
  field1: String
}