Table 'table_name' is read only - How to solve MySQL error: table is read only

Table 'table_name' is read only - How to solve MySQL error: The table is read-only, specific code examples are needed

When using the MySQL database, sometimes I encountered an error message: Table 'table_name' is read only, which means that a certain table in the database is read-only and cannot be written. This problem may occur in a variety of situations, such as incorrect permission settings, full disk space, file system errors, etc.

The following will introduce several possible causes and solutions, and provide specific code examples to help you solve the MySQL error problem.

1. Incorrect permission settings
   When the MySQL user does not have write permission for a certain table, the table read-only error will occur.

Solution:
Confirm whether the MySQL user has write permissions for the table. You can use the following command to check:

SHOW GRANTS FOR 'user'@'localhost';

Where, 'user' is the permission you want to check The user name, 'localhost' is the host address for accessing MySQL, which can be modified according to the actual situation.

If you find that the user permissions do not include write operations on the table, you can use the following command to add write permissions to the user:

GRANT INSERT, UPDATE, DELETE ON `database_name`.`table_name` TO 'user'@'localhost';

This will give the user 'user' the permission in the database 'database_name' Write permission for table 'table_name'.

2. Disk space is full
   If the disk space is full, MySQL cannot perform write operations.

Solution:
You can check the disk usage through the following command:

SHOW VARIABLES LIKE 'datadir';

This command will display the path of the MySQL data directory, which can be modified according to the actual situation.

If the disk space is full, you need to clean up some useless files on the disk or expand the disk capacity.

3. File system errors
   In some cases, a file system error may occur, causing a table to be set to read-only.

Solution:
You can fix the file system error through the following command:

REPAIR TABLE `table_name`;

This command will repair the table and restore the table to a writable state.

The above are several possible ways to solve the MySQL error "Table 'table_name' is read only". Of course, when encountering this error, the specific reasons and solutions need to be judged based on the actual situation. I hope the above content can help you solve the problem of MySQL error.

Please note that the code examples provided above are for reference only, and the specific codes need to be modified and adjusted according to the actual situation. In addition, please be careful when performing database operations to avoid accidental loss of data.

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