1
DROP TABLE username_test;
3
CREATE TABLE username_test (
8
CREATE TRIGGER insert_usernames
9
BEFORE INSERT OR UPDATE ON username_test
11
EXECUTE PROCEDURE insert_username (username);
13
INSERT INTO username_test VALUES ('nothing');
14
INSERT INTO username_test VALUES ('null', null);
15
INSERT INTO username_test VALUES ('empty string', '');
16
INSERT INTO username_test VALUES ('space', ' ');
17
INSERT INTO username_test VALUES ('tab', ' ');
18
INSERT INTO username_test VALUES ('name', 'name');
20
SELECT * FROM username_test;