I am trying to establish a connection to an Oracle database. I enter a connection string and click on test and it is successful. But after clicking on 'OK' and LINQ Pad is populating I get an error
This looks like an issue with the LINQ to DB driver. You can report it here:https://github.com/linq2db/linq2db.LINQPad/issues
Filled issue https://github.com/linq2db/linq2db.LINQPad/issues/72, but it will help if you provide some details there:
SELECT USER FROM DUAL
Oracle version 12.1.0
result of 'SELECT USER FROM DUAL' is a single row with a single column "WEB"