How Can I Execute MySQL User-Defined Variables with MySqlCommand?

Executing MySQL User Defined Variables with MySqlCommand

When working with MySQL databases using MySql.Data.MySqlClient, you may encounter issues executing statements involving user-defined variables. Let's explore how to overcome this challenge.

Your code attempt to execute SET @a = 1;SELECT @a; results in a fatal error. By verifying with simpler statements, you confirmed that the issue stems from user-defined variables.

To resolve this, refer to the solution provided in the referenced blog. You need to add ;Allow User Variables=True to the connection string:

$connectionstring = "Server=$Server;Port=$port;Database=$DataBase;Uid=$User;Pwd=$Password;allow zero datetime=yes;Allow User Variables=True"

This enhancement enables your connection to allow the usage of user-defined variables within queries. After implementing this change, you will be able to execute statements like SET @a = 1;SELECT @a; successfully.

Note that the mentioned version number (6.3.6.0) for MySql.Data is not critical for this solution to work.

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