But suppose you want to assign all of your database users’ granted roles to also be their default roles. Instead of manually running an ALTER USER … DEFAULT ROLE command for each of the 357 users in my Vertica database, you can have Vertica generate and run all those commands for me!
Example:
dbadmin=> SELECT user_name, all_roles, default_roles
dbadmin-> FROM users
dbadmin-> WHERE user_name ILIKE 'role_user%'
dbadmin-> ORDER BY 1;
user_name | all_roles | default_roles
------------+-----------+---------------
role_user1 | r1 |
role_user2 | r1, r2 |
role_user3 | r1, r3 |
role_user4 | r2 |
role_user5 | r2, r3 |
(5 rows)
dbadmin=> \! /opt/vertica/bin/vsql -Atc "SELECT 'ALTER USER ' || user_name || ' DEFAULT ROLE ' || REPLACE(all_roles, '*', '') || ';' FROM users WHERE NOT is_super_user AND all_roles <> '';" | /opt/vertica/bin/vsql –q
dbadmin=> SELECT user_name, all_roles, default_roles
dbadmin-> FROM users
dbadmin-> WHERE user_name ILIKE 'role_user%'
dbadmin-> ORDER BY 1;
user_name | all_roles | default_roles
------------+-----------+---------------
role_user1 | r1 | r1
role_user2 | r1, r2 | r1, r2
role_user3 | r1, r3 | r1, r3
role_user4 | r2 | r2
role_user5 | r2, r3 | r2, r3
(5 rows)
Helpful Links:About the Author
James Knicely
Vertica Field Chief Technologist
I've had the privilege of working with many database technologies in my career. But after being introduced to Vertica in May of 2011 as a client, I was hooked on the new technology after witnessing a query run in milliseconds that had previously ran for hours on the legacy database we had in place. It was then that I knew I wanted to eventually join the Vertica team, and 4 years later I did! I am currently a Vertica evangelist and am ready to help you get on board! Please feel free to reach out to me with any questions you have about Vertica and make sure to follow my Vertica Quick Tips!
