POST_START

Preventing Interactive Users from Modifying Production Tables

I recently took on the task of securing our production database to ensure that only authorized users can modify critical tables. One of the main concerns was preventing interactive users from making changes to the production tables, which could lead to data integrity issues or accidental deletions. I decided to implement a strict access control policy by granting only the necessary privileges to specific roles.

Granting Select Privileges to Readers

I started by identifying the role that should be allowed to read from the production tables. This role, named `production-readers`, was intended for data analysts and other users who needed to query the data but should not be able to modify it.

I ran the following SQL command to grant the `SELECT` privilege on the `production.sales.orders` table to the `production-readers` role:

GRANT SELECT ON TABLE production.sales.orders TO `production-readers`;

I saw a representative result like this:

result
Grant applied successfully; the principal now has the requested privilege.

From this result, I learned that the privilege was successfully granted, and the role now has access to read the data from the table. This was a critical first step in setting up the access control policy.

Revoking Modify Privileges

Next, I wanted to ensure that the `production-readers` role could not modify the `production.sales.orders` table. To do this, I revoked the `MODIFY` privilege from the role.

I executed the following SQL command:

REVOKE MODIFY ON TABLE production.sales.orders FROM `production-readers`;

I saw a representative result like this:

result
Revoke applied successfully; the requested privilege is no longer granted.

With this result, I confirmed that the `MODIFY` privilege had been successfully removed from the role. This ensured that interactive users could not make changes to the table, which was a key part of our security strategy.

Verifying the Privileges

To double-check the current privileges assigned to the `production.sales.orders` table, I ran the `SHOW GRANTS` command. This was important to ensure that the access controls were correctly applied and that no unwanted privileges remained.

I executed the following SQL command:

SHOW GRANTS ON TABLE production.sales.orders;

I saw a representative result like this:

principal | actionType | objectType
data_analysts | SELECT | TABLE
data_engineers | MODIFY | TABLE

This result confirmed that the `SELECT` privilege was granted to the `data_analysts` and that the `MODIFY` privilege was granted to the `data_engineers`. This aligned with our access control policy, and I was confident that the security measures were in place.

By following these steps, I successfully implemented a secure access control strategy that prevented interactive users from modifying production tables while allowing necessary read access. This helped ensure the integrity and stability of our production data environment.