I guess I should have clarified. I am having trouble figuring out how to construct the IF statement to see if that item exists in the foreign table something like:
count=select count(*) from table;
if count=0 {
insert fkey into myOtherTable
}
On 4/18/06, Andreas Kretschmer <akretschmer@spamfence.net> wrote: Mark True <darfoo@gmail.com> schrieb:
>
> Here is the question:
>
> I have a situation where I need to create triggers to cascade an insert
> operation to many tables to maintain foreign key constraints.
>
> So at a high level
>
> INSERT INTO myTable (Name, Address, Zip) VALUES ('Mark', '3 Dingle St.',
> '01832')
>
> myTable has a relation to two other tables, which contain Zip and Address.
> Before I insert into myTable I want to:
>
> Check if '3 Dingle St.' exists in table Address, if not insert it
> Check if '01832' exists in table Zip and if not insert it
For such task i write a function (plpgsql). This obtains all parameters,
do the checks and insert into the other tables and the table with the fk
constraints.
HTH, Andreas
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