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MySQL Error ERROR 1099 (HY000): Table was locked with a READ lock and can't be updated
To get rid of LOCK TABLES query, you need to use UNLOCK TABLES.
Let us create a table −
mysql> create table demo6 −> ( −> country_name varchar(100 −> ) −> ); Query OK, 0 rows affected (1.51 sec)
Insert some records into the table with the help of insert command −
mysql> insert into demo6 values('US');
Query OK, 1 row affected (0.11 sec)
mysql> insert into demo6 values('UK');
Query OK, 1 row affected (0.08 sec)
mysql> insert into demo6 values('AUS');
Query OK, 1 row affected (0.11 sec)Display records from the table using select statement −
mysql> select *from demo6;
This will produce the following output −
+--------------+ | country_name | +--------------+ | US | | UK | | AUS | +--------------+ 3 rows in set (0.00 sec)
Here, I have a lock on the above table only for read operator. Following is the query −
mysql> lock tables demo6 read; Query OK, 0 rows affected (0.00 sec)
Following is the error when you try to insert on the above table −
mysql> insert into demo6 values('IND');
ERROR 1099 (HY000): Table 'demo6' was locked with a READ lock and can't be updatedIf you use UNLOCK TABLES, then you can insert records in the same table −
mysql> UNLOCK TABLES; Query OK, 0 rows affected (0.00 sec)
Insert some records into the table with the help of insert command −
mysql> insert into demo6 values('IND');
Query OK, 1 row affected (0.09 sec)Display records from the table using select statement −
mysql> select *from demo6;
This will produce the following output −
+--------------+ | country_name | +--------------+ | US | | UK | | AUS | | IND | +--------------+ 4 rows in set (0.00 sec)
Updated on: 19-Nov-2020
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