Function bind_expression_plan_routines_for_storage 

pub fn bind_expression_plan_routines_for_storage(
    engine: &dyn RoutineResolution,
    plan: &mut ExpressionPlan,
    params: &[SQLParam],
    ctes: &BindingContext<'_>,
    schema: &RowSchema,
) -> Result<Option<ColumnType>, SQLError>

Bind every routine call owned by a stored scalar expression and validate its complete query-valued descendants against the expression’s row scope.