如何让SQLyog加载正确dll以解决Error No.2058插件加载失败问题？

Let's break down the fix for this error—you're right that modern MySQL has replaced the old authentication_windows_client.dll with libmysql.dll, which now includes the Windows authentication plugin functionality. Here are the most reliable solutions to get SQLyog loading the correct DLL:

Method 1: Copy the MySQL DLL to SQLyog's Folder #

• Find your MySQL installation directory (usually C:\Program Files\MySQL\MySQL Server X.X, where X.X is your version like 8.0 or 5.7).
• Navigate to the lib subfolder inside that directory, and locate libmysql.dll.
• Copy this DLL file into your SQLyog installation folder (common paths are C:\Program Files\SQLyog or C:\Program Files (x86)\SQLyog, depending on whether you're using 32 or 64-bit SQLyog).
• Restart SQLyog and try connecting again. This forces SQLyog to use the updated DLL directly.

Method 2: Add MySQL's Lib Folder to Your System PATH #

• Open System Properties: Right-click "This PC" > Properties > Advanced system settings.
• Go to the Advanced tab and click Environment Variables.
• Under System Variables, find the Path variable and click Edit.
• Click New and paste the full path to your MySQL lib folder (e.g., C:\Program Files\MySQL\MySQL Server 8.0\lib).
• Save all changes by clicking OK in each window, then restart your computer to apply the PATH update.
• Launch SQLyog again—your system will now point it to the correct MySQL DLL automatically.

Method 3: Match SQLyog and MySQL Architectures #

• DLL loading failures often happen if you mix 32-bit and 64-bit versions. Double-check that you're using a 32-bit SQLyog with a 32-bit MySQL install, or 64-bit SQLyog with 64-bit MySQL.
• If there's a mismatch, install the matching version of either SQLyog or MySQL to resolve the conflict.

Quick Troubleshooting Check #

• Ensure the MySQL service is running: Open Services.msc (type it into the Windows search bar), look for the MySQL service (named something like MySQL80), and confirm it's set to "Running". A stopped service can also trigger plugin-related errors.

内容的提问来源于stack exchange，提问作者M Siddique