MySQL Error 1295: Command Not Supported in Prepared Statement

Review your application code or SQL queries that are generating prepared statements. Identify any commands that are known to be unsupported by the prepared statement protocol. Common culprits include `CREATE TABLE`, `ALTER TABLE`, `DROP TABLE`, `TRUNCATE TABLE`, `GRANT`, `REVOKE`, `LOAD DATA INFILE`, and stored procedure calls that might implicitly perform these actions.

Refactor your code to execute these unsupported commands outside of prepared statements. For DDL statements (like `CREATE`, `ALTER`, `DROP`), execute them directly using a standard query execution method.

EXECUTE 'CREATE TABLE my_new_table (id INT PRIMARY KEY);'

For DML statements that are not supported, consider if a different approach can be used. For example, if `LOAD DATA INFILE` is causing issues, you might need to read the file line by line and execute individual `INSERT` statements (though this is less efficient).

When you encounter Error 1295, it signifies that the specific SQL command you're attempting to use within a prepared statement is not compatible with the protocol. The most straightforward solution is to execute these commands as standard SQL statements instead of using prepared statements.

In your application code, if you're using a library for database interaction (e.g., PDO in PHP, `mysql.connector` in Python), use the method for executing non-prepared queries. For example, in PDO (PHP):

$db->exec("CREATE TABLE IF NOT EXISTS users (id INT AUTO_INCREMENT PRIMARY KEY, name VARCHAR(255))");

If you're executing SQL directly from a client tool (like MySQL Workbench or the `mysql` command-line client), simply type the command without any placeholders or preparation steps.

CREATE TABLE IF NOT EXISTS products (id INT, name VARCHAR(100));

The prepared statement protocol evolves with MySQL versions. Older versions of the MySQL client or server might not support certain commands that newer versions do. Check the version of your MySQL server and your client library (e.g., libmysqlclient, MySQL Connector/J, etc.).

Consult the MySQL documentation for your specific server version to see which commands are supported in prepared statements. You can often find this information in the 'Prepared Statements' or 'SQL Statement Syntax' sections.

If you are using an older version, consider upgrading your MySQL server and client libraries to a more recent, stable release. Always test upgrades thoroughly in a development or staging environment before applying them to production.