Mysql - Table lock error - mysql

Question

I am experiencing some problems with table locking. I have locked certain number of table in transaction. LOCK TABLES t1 READ, t2 READ, t3 READ, t4 READ,t5 READ,t6 READ,t7 READ;
While reading its ok, but when I am trying to write/update to this tables it's showing the error Table 't1' was locked with a READ lock and can't be updated
But I never locked the table for write, I have to write to these tables with updated values.
My aim is I need to select and I need to update rows, while others should not interact with above tables until the process finished.
Much appreciated your solutions!

Answer 1

From mysql doc:
Rules for Lock Acquisition
To acquire table locks within the current session, use the LOCK TABLES statement. The following lock types are available:
READ [LOCAL] lock:
The session that holds the lock can read the table (but not write it).

Answer 2

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)