A quick workaround to avoid people doing "SELECT *" on your tables (which I consider harmful, see stackoverflow) in BigQuery is the following:

  1. Create a policy tag in the policy tags page. I create it under a new taxonomy "sql_rules", and call it "no_select_star"
  2. Once created, in the policy tag taxonomy page I enable the "enforce access control" option. If you need users to bypass this policy (e.g. needs to run bigquery copy operations) you can add the "fine graded reader" role to the principal associated with the policy tag in the same page.
  3. In the table you want to protect, add a dummy column (I call it "do_not_select_star") and assign it the policy tag
  4. Done! From now on, SELECT * will throw an error.

For more info see Google Cloud docs