Hi,
Would anyone know if it's possible to define a rule to do the folowing.
I have two tables:
journal_master (serial #, account, date, debit $, credit $)
journal_summary (account, date, debit $, credit $)
each time a transaction occurs, a new journal_master row is
added, and the cumulative amounts added to the summary table.
I can have a rule like
CREATE RULE js_update AS
ON INSERT TO journal_master
DO
UPDATE journal_summary set debit = debit + new.debit,
set credit = credit + new.credit where account = new.account and
date = new.date;
My problem is that if the journal_summary row doesn't exist, I
really want to an INSERT. In pseudo code, something like:
CREATE RULE js_update AS
ON INSERT TO journal_master
DO
if journal summary row exists for this date and account then
UPDATE journal_summary set debit = debit + new.debit,
set credit = credit + new.credit where account = new.account and
date = new.date
else
INSERT INTO journal_summary (account, date, debit, credit)
VALUES (new.account, new.date, new.debit, new.credit)
end
Is it possible ?
Thanks,
Bryan
