I'm quite new to PostgreSQL, started off with version 8.0 some time ago.
Recently I've begun working with stored procedures and now I've come
accross a little problem / issue I can't seem to figure out.
A quick overview of the situation:
I have one stored procedure with returns a SET OF a new (record) type
function calculate_cost(...): returns set of mytype;
This stored procedure works without a problem. I can just do a "select *
from calculate_cost(...)" and I can iterate the returned set of mytype.
Now I have created another stored procedure, let's call if function
test(...). I want this function to call the calculate_cost(...) stored
procedure, iterate the returned set and for instance return the total
cost (sum of mytype.cost).
I came as far as getting the first returned result by performing a
SELECT INTO mytype function calculate_cost(...)...etc., which is normal
I guess since a SELECT INTO only returns a single row according to the
manual. However is there a way to loop / iterate all of the results?
If it is possible to do this with PostgresSQL, I'd be really grateful if
someone posted a little code snippet on how to do this.