PostgreSQL - relation [table] does not exist

Question

I just created a new user that I want to have access to a limited number of our public tables. The user is created and I granted privs to one public table for now. I then logged into the DB as that user and tried to run a SELECT on the table that the user should be able to get to but I must of missed a step or did something wrong because when I run the query I get:

relation [table] does not exist

Below are the steps I took, in order.

CREATE USER pqb2b WITH PASSWORD 'foo'


 select * from pg_user;
 usename  | usesysid | usecreatedb | usesuper | usecatupd |  passwd   | valuntil | useconfig
 ----------+----------+-------------+----------+-----------+----------+----         |
postgres |       10 | t           | t        | t         | ******** |          | 
 pgb2b   | 17267767 | t           | f        | f         | ******** | infinity |

(1 rows)

GRANT ALL on b_users to pgb2b;



SELECT
schemaname||'.'||tablename
FROM
pg_tables
WHERE
has_table_privilege (
    'pgb2b',
    schemaname||'.'||tablename,
    'select'
 )
AND
schemaname NOT IN (
    'pg_catalog',
    'information_schema'
 );

---

public.b_users
(1 row)



~ postgres$ psql -U pgb2b  mydb
psql (9.0.3)
Type "help" for help.

mydb=> select * from b_users;
ERROR:  relation "b_users" does not exist
LINE 1: select * from b_users;

 mydb=> \d+ b_users
 Did not find any relation named "b_users".

Answer 1

Note for others who may see this, though it may not apply to this particular question --

If you are not using the public schema, you need to update the search_path

SET search_path TO my_schema, public;

Credit: Why does PostgreSQL's \dt show only public schema tables?

Answer 2

Even though I was granting privileges to my pgb2b user, I forgot to specify usage for that user:

GRANT usage on schema public to pgb2b;

This fixed the issue. I found this post about setting up PostgreSQL user permissions very helpful.