MySQL 1038

This error occurs when MySQL runs out of memory while sorting a query result. It indicates that the query requires more memory than is available.

How It Affects Your App

MySQL 1038 ER_OUT_OF_SORTMEMORY indicates that the application has run out of memory allocated for sorting operations. This can cause the application to slow down or even crash, as it is unable to complete the sorting operations. It can also lead to data corruption, as the application may not be able to store the sorted data correctly. In addition, the application may not be able to access the data it needs, leading to further errors.

How To Fix

1. Identify the source of the MySQL 1038 error. This can be done by checking the MySQL error log for the specific error code.
$ tail -f /var/log/mysql/error.log
2020-08-20T14:10:00.123456Z 0 [ERROR] InnoDB: Column last_name in table t1
has a column type of VARCHAR(255) but it should be VARCHAR(128)
2020-08-20T14:10:00.123456Z 0 [ERROR] InnoDB: MySQL Error 1038: Column last_name in table t1 has a column type of VARCHAR(255) but it should be VARCHAR(128)
2. Alter the column type to the correct type.
ALTER TABLE t1 MODIFY COLUMN last_name VARCHAR(128);
3. Restart the MySQL server.
$ sudo service mysql restart
4. Check the MySQL error log to ensure the error has been resolved.
$ tail -f /var/log/mysql/error.log
2020-08-20T14:10:00.123456Z 0 [Note] InnoDB: Column last_name in table t1
has been successfully altered to VARCHAR(128)
5. As a best practice, use an automated database observability tool to monitor and fix MySQL 1038 errors. Automated database observability tools can detect MySQL 1038 errors and alert the user when they occur. This allows the user to quickly identify and fix the issue before it becomes a major problem. Additionally, these tools can provide detailed insights into the performance of the database, allowing the user to identify and address any potential issues before they become a problem.

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