Re: Create TOAST table only if AM needs

>  /* ------------------------------------------------------------------------
>   * Planner related callbacks for the heap AM
> @@ -2558,6 +2615,8 @@ static const TableAmRoutine heapam_methods = {
> 
>       .relation_estimate_size = heapam_estimate_rel_size,
> 
> +     .needs_toast_table = heapam_needs_toast_table,
> +

I'd rather see this have a relation_ prefix.

+1 to overall patch with that comment incorporated. This seems simple enough to incorporate for v12. Though stating that blind-folded with what else is remaining to be must done for v12.