Re: [HACKERS] generated columns

> Stored generated columns should be treated just like we'd treat a column
> value added by a trigger.
>
> e.g. if we had a Timestamp column called LastUpdateTimestamp we would
> want to send that value

Generated columns cannot have volatile expression results in them, so
this case cannot happen.

Also, we don't know whether the generation expression on the target is
the same (or even if it looks the same, consider locale issues etc.), so
we need to recompute the generated columns on the target anyway, so it's
pointless to send the already computed stored values.