BigQuery lacks native support for fine-grained row-level security, but it can be simulated using views, SESSION_USER(), and join tables.
To implement row-level security in BigQuery, create a base table with sensitive data, a mapping table for user access, and a view that restricts data based on the logged-in user.
Create a base table with sensitive data using the CREATE TABLE statement.
Insert data into the customer_orders table using the INSERT INTO statement.
Create a table to manage row-level access and insert user emails into it.
Create a view that filters data based on the SESSION_USER() function.
The view joins the base table with the mapping table and filters rows based on the logged-in user's email.
Advantages of this approach include compatibility with standard BigQuery, scalability for multi-user scenarios, and centralized logic in the view.
This method provides a simple and powerful way to safeguard sensitive data in BigQuery by leveraging externalized access logic and SESSION_USER().