Postgres vs dns

Question

I need to setup a dns server so I grabbed powerdns and postgres from the repos.
I found this guide
http://www.idimmu.net/2008/10/10/Using- … untu-Gutsy
but when I got to the part of insterting my specific hostnames it doesnt allow it for some reason.
insert into records (domain_id,name,content,type,ttl,prio) values(1,'myservertest','myserver','NS',86400,NULL)
It errors and says: insert or update on table 'records' violates foriegn key constraint "domain_exists" key domain_id is not present in table "domains"
--EDIT---
bah, I also tried something called poweradmin to setup the database but stuck on step 4 "updating database..." and gave up after 30 mins.
Last edited by darthaxul (2009-04-15 07:25:53)

Answer 1

What cactus said... Instead of storing 'foo.com' in the 'records' table, the database stores it in the 'domains' table with a Primary Key (eg, '1'), and then references the key '1' in the 'domains' table from the 'records table.
Data integrity -> If 'foo.com' was stored in the 'records' table for each record, then it would be easy to accidentally create a record for 'fooo.com' and spend hours trying to figure it out.
Sanitising Data -> (Not Satanising) Why store 'foo.com' 100 times for 100 records? When you can store '1' instead? Doesn't really make a difference in a database this small but in very large databases, it can save space.