Answer by zloctb for Mysql - Table lock error

MariaDB [test]> lock table super1 read;Query OK, 0 rows affected (0.00 sec)MariaDB [test]> select * from super1;+----+| id |+----+|  1 ||  2 ||  3 ||  5 ||  6 ||  7 |+----+6 rows in set (0.00 sec)MariaDB [test]> insert into super1 VALUE(10);ERROR 1099 (HY000): Table 'super1' was locked with a READ lock and can't be updted

other session can SELECT too

MariaDB [test]> unlock tables;Query OK, 0 rows affected (0.00 sec)MariaDB [test]> lock table super1 write;Query OK, 0 rows affected (0.00 sec)

other session can't SELECT

MariaDB [test]> insert into super1 VALUE(10);Query OK, 1 row affected (0.00 sec)MariaDB [test]> insert into super1 VALUE(11);Query OK, 1 row affected (0.00 sec)MariaDB [test]> unlock tables;Query OK, 0 rows affected (0.00 sec)