Re: lastval()

Abhijit Menon-Sen wrote:
> At 2005-05-10 23:30:05 -0400, pgman@candle.pha.pa.us wrote:
> >
> > > By the way, what would lastval() do if an insert trigger inserts
> > > a row into a table with another serial column?
> >
> > It fails, just like it would fail now if the trigger inserted into
> > the same table that used the trigger, or a rule.
>
> I don't understand what you mean. "Just like it would fail now"? It
> doesn't exist yet, how can it fail? And how would it know when to
> fail anyway, rather than return a wrong value?

Uh, if the table's sequence name is 'tab_x_seq', and you do
currval('tab_x_seq'), you will get the trigger or rule insert id in that
case.

So, currval() widens a problem we already have if the rule/trigger
inserts into the same table.

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