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-- We do not need to run the trigger on deletes, as the only time we are deleting history is when the user
-- has already been deleted
-- This actually slows down deleting all the history a good bit!
create or replace function user_history_count()
returns trigger as
$func$
begin
if (TG_OP='INSERT') then
update total_history_count_user set total = total + 1 where user_id = new.user_id;
if not found then
insert into total_history_count_user(user_id, total)
values (
new.user_id,
(select count(1) from history where user_id = new.user_id)
);
end if;
end if;
return NEW; -- this is actually ignored for an after trigger, but oh well
end;
$func$
language plpgsql volatile -- pldfplplpflh
cost 100; -- default value
create or replace trigger tg_user_history_count
after insert on history
for each row
execute procedure user_history_count();
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