Module registry 

Built-in function registry for SQL planning.

Tracks known functions, their categories, arg specs, return types, and whether they trigger special engine routing (e.g., vector_distance → VectorSearch).

Structs

ArgTypeSpec

Specification for a single function argument position.

FunctionMeta

Metadata about a known function.

FunctionRegistry

The function registry.

Version

Semantic version for tracking when a function was introduced.

Enums

FunctionCategory

Function category.

SearchTrigger

Whether a function triggers special engine routing.