Jdbc connection error from Google Apps Script

Question

I have created a Google Cloud Project MySQL database to use in conjunction with the Jdbc service provided by Google Apps Script. Everything went as planned with the connecti

Answer 1

I think this is a permission issue in your second account. Necessary information are missing in your question. But, the secound account, if run as a another user, won't necessarily have your sqlservice authorization. The permission,

https://www.googleapis.com/auth/sqlservice

Manage the data in your Google SQL Service instances

is required to use Jdbc.getCloudSqlConnection(url), while Jdbc#getConnectionUrl() just requires external link connection permission

https://www.googleapis.com/auth/script.external_request

I believe that you can only connect to sql instances owned by you with getCloudSqlConnection() which doesn't even require external connection permission. This method probably calls your sql instance internally.

References:

• Jdbc#getCloudConnection

• Jdbc#getConnection

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Conclusion

To connect to any external service, you need external_request permission. But, You don't need that permission to connect to your own documents say, Spreadsheets owned by you/have edit access permission - through SpreadsheetApp.openByUrl. I believe it's the same thing with Jdbc.getCloudSqlConnection(). It calls your Google sql internally - So, even if you grant external request permission, It won't work. What will work for this method is1.Installable triggers (which runs as you). One more thing I'll try is: 2. Add the second account also as owner in GCP-IAM(may not work though).