Module expressions 

Bind catalog expression nodes to declared column and domain-value types.

Structs

ColumnReference

A resolved attribute in the same generation as the expression’s type lookup. Attribute numbers are catalog identities, not positions after projection or a dropped column.

ExpressionContext

RoutineDeclaration

RoutineIdentity

Traits

ExpressionRoutines

ExpressionSchema

Stored expression encoding needs the original attribute identity and collation as well as its type. Borrow declarations directly when those identities are available; an execution-only schema retains its existing positional contract.

Functions

select_routine

Select a declared catalog signature while retaining supplied positions and concrete polymorphic targets.