PRIMARY KEY and indexes - Mailing list pgsql-general

Hi

I come from a MS-SQL background and I'm trying to get some clarity on
indexes in Postgres. If anyone can help with the following questions it
would be much appreciated:

1. When creating a primary key contraint on a table, is an equivalent index
automatically created for you, or would I have to create an index manually?
2. How do I create a clustered index in postgres?

Thanks
Craig