Module registry 

Function registry: maps SQL function names called inside WHERE / projections to UQA-side semantics (text match, vector knn, hybrid fusion, …).

The registry only classifies a function by name; the compiler dispatches the actual operator construction once the call signature is bound to its arguments.

Enums

FunctionKind

Functions

is_operator_join_table_function

Whether a row-producing operator function owns an explicit relation argument. These functions are compiled specially so their first SQL argument is a relation identifier rather than a scalar value.

is_registered

lookup

registered_names

Sorted list of registered SQL function names. CLI completion and documentation generators should consume this instead of duplicating function names.