In the context of a plpgsql script is a possible to access the number of rows effected by an UPDATE or DELETE statement? It could be used to simplify, and probably improve performance on, many scripts. I would like to do something like:
update foo set bar = bar + new.amount where key = new.key;
if ROWS_UPDATED > 0 then
-- This would be less likely to occur
insert into foo (key, bar) values (new.key, new.bar);
end if;
Otherwise I must construct an additional SELECTstatement to see if the row exists. Something like:
select 1 from foo where key = new.key;
if found then
update foo set bar = bar + new.amount where key = new.key;
else
insert into foo (key, bar) values (new.key, new.bar);
end if;
Might this be a worth while feature if it does not now exist?
TIA.