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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.
Sometimes, you may want to set default values for item fields 
N::NodeType {
  field1: String DEFAULT "default",
  field2: U32 DEFAULT 0,
  created_at: Date DEFAULT NOW
}
Helix will use the default value if a value is not provided when inserting the item.

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Default value types

TypeExampleDescription
StringDEFAULT "value"Default string literal
NumberDEFAULT 0Default numeric value
TimestampDEFAULT NOWAutomatically set to current timestamp on creation

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Example

In the example below, the age field has not been provided when inserting the item so the default value of 0 will be used. 
QUERY createUser(name: String) =>
    user <- AddN<User>({name}) 
    RETURN user