An example of the operation on the server is shown below.

1. Disable a masking policy
   Execute the pgx_enable_confidential_policy system management function to disable a masking policy.

   postgres=# select pgx_enable_confidential_policy(table_name := 't1', policy_name := 'p1', enable := 'f');
    pgx_enable_confidential_policy 
   ---------------------------------
    t
   (1 row)

2. Confirm the displayed data
   Confirm that the original data is displayed by disabling the masking policy.

   postgres=# select * from t1;
    c1 |      c2       
   ----+---------------
     1 | 012-3456-7890
     2 | 012-3456-7891
     3 | 012-3456-7892
   (3 row)

3. Enable a masking policy
   Execute the pgx_enable_confidential_policy system management function to enable a masking policy.

   postgres=# select pgx_enable_confidential_policy(table_name := 't1', policy_name := 'p1', enable := 't');
    pgx_enable_confidential_policy 
   ---------------------------------
    t
   (1 row)

4. Confirm the displayed data
   Confirm that the masking target data has been correctly changed.

   postgres=# select * from t1;
    c1 |      c2       
   ----+---------------
     0 | 012-****-****
     0 | 012-****-****
     0 | 012-****-****
   (3 row)