SQL help ASAP plz!

Question

Hello! :)
I'll try to describe my problem. So let's assume that I have a function that recursively calls itself. In this function first i do an executequery, and while i 'browse' through the resultset(for eg.: while (rs.next())), i make updates (updatequeries) on those records too. I wanted to make it faster, and i decided to do one connection (for eg.: conMain) and one statement (for eg.: stmtMain), and do all executequeries and executeupdates via this stmtMain. And it didn't work well. My code runs well only on the first row of the rs.next(), and call itself recursively, but only on the first row, in every while(rs.next()). And i think after finishing, and stepping back from recursion, it doesn't get the rs's next row (rs.next()). So I thought about maybe the updatequeries and executequeries doesn't fit next to each other or what!? So i made 2 public statments one is stmtMain and one is execStatement for example. And i used stmtMain for executeupdates, and execStatement for executequeries. And it still didn't work well! I tried out, that i get out recurcion(so only call the function once), and then on the first Resultset the while(rs.next()) stepped through ALL the rows properly. So as i saw the recursion somehow makes the resultset's next() value FALSE!? I haven't tried out yet, to make statements in every call of that recursive function, but i think it'd work. But i think that would slow down the whole source. I read somewhere that a statement can handle lots of resultsets and so, but in this case it seemed that if i call recursively that function, after stepping back, the while(rs.next()) gives false (or what!?), and not stepping to the next record, as it DOES if there's no recursion.
Huh, i hope i've made myself clear, sorry for my english, and maybe i haven't read the documents well or so, but i'm a bit angry i spent my whole last night trying to fix this problem, and discover the problem.
pls help asap :)
thanks
athalay

Answer 1

well, I'll try to explain it a bit more. So I have records named 'catalog'. And this record type has fields: parentid (this points to another 'catalog' record) and catalogdesc (the description of the catalog). The catalogdesc contains the description PLUS before the description, a prefix. As you can see in books, prefix for example: 1.2.2.1 etc. So I want to modify the prefix (which is included in the 'catalogdesc' field) of the childs BASED on the parent's prefix. But in the beginning the parent's prefix is changed too! (example, because a catalog before itself has been deleted) So I have to modify all of it's children's prefix, and their childrens and theirs etc. You see now!? So this is why I do an executequery(which selects the parent's childs), I go into the while(rs.next()) loop, I do an executeupdate(to update the children's prefix based on their parent's), and then call this funtion on them, because they have childrens too!
This is why I need recursion, I hope it's clearer now.
So I still need help :/
thanks
athalay