UPDATE participants SET is_owner = 1 WHERE username = 'whit537';

gratipay::DATABASE=> select * from participants where is_owner;
┌──────────┬───────────────┬─────────────────┬───────┬──────────────┬──────────┬─────────┬──────────────────┬─
│ username │ session_token │ session_expires │ ctime │ claimed_time │ is_admin │ balance │ anonymous_giving │ 
├──────────┼───────────────┼─────────────────┼───────┼──────────────┼──────────┼─────────┼──────────────────┼─
└──────────┴───────────────┴─────────────────┴───────┴──────────────┴──────────┴─────────┴──────────────────┴─
(0 rows)

gratipay::DATABASE=> UPDATE participants SET is_owner = 1 WHERE username = 'whit537';
ERROR:  column "is_owner" is of type boolean but expression is of type integer
LINE 1: UPDATE participants SET is_owner = 1 WHERE username = 'whit5...
                                           ^
HINT:  You will need to rewrite or cast the expression.
gratipay::DATABASE=> UPDATE participants SET is_owner = true WHERE username = 'whit537';
UPDATE 1
gratipay::DATABASE=>