PostgreSQL 11 Administration Cookbook

How to do it…

1. We want to grant somerole the ability to view existing data and insert new data; we also want to provide the ability to amend existing data, limited to column col2 only. We use the following self-evident statements:

GRANT SELECT, INSERT ON someschema.sometable2 TO somerole; GRANT UPDATE (col2) ON someschema.sometable2 TO somerole;

2. Let's assume the identity of the somerole role and test these privileges with the following commands:

SET ROLE TO somerole; INSERT INTO someschema.sometable2 VALUES (1, 'One'); SELECT * FROM someschema.sometable2 WHERE col1 = 1;

3. As expected, we are able to insert a new row and to view its contents. Let's now check our ability to update individual columns. We start with the second column, which ...