1--disable_warnings
2DROP TABLE IF EXISTS t7;
3--enable_warnings
4SET sql_mode='NO_ENGINE_SUBSTITUTION';
5CREATE TABLE t7(c1 ENUM('a','abcdefghijabcdefghijabcdefghijabcdefghijabcdefghij') NULL);
6INSERT INTO t7(c1) VALUES(NULL);
7INSERT INTO t7(c1) VALUES('');
8INSERT INTO t7(c1) VALUES('a');
9INSERT INTO t7(c1) VALUES('abcdefghijabcdefghijabcdefghijabcdefghijabcdefghij');
10INSERT INTO t7(c1) VALUES('abcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghijabcdefghij');
11SELECT * FROM t7;
12SELECT COUNT(c1) AS null_rows FROM t7 WHERE c1 IS NULL;
13DROP TABLE t7;
14SET sql_mode=default;
15