Function bind_source_plan_schema_for_execution 

pub fn bind_source_plan_schema_for_execution(
    routines: &dyn RoutineResolution,
    source: &mut SourcePlan,
    params: &[SQLParam],
    ctes: &BindingContext<'_>,
    outer: Option<&RowSchema>,
) -> Result<RowSchema, SQLError>

Bind every table-function source in one execution-owned source plan to its exact routine identity and return the schema derived from those same bindings.