After using the sqlsrv extension, I always get the prompt Undefined function in vscode, how to solve it?

Question

Since the database uses sqlserve, it needs to be accessed using the sqlsrv extension. Once the content is written, it can be used normally. However, vscode always prompts for error correction. If too many files are written, errors will appear everywhere. As shown below:

The code is completely usable, but the error correction is too annoying, and the mess is full of errors. How can I make vscode recognize this extension? Function, because I am just getting started, I am afraid that there will be other errors, and I don’t want to turn off error correction completely. Is there any good way? Thanks