Edit Database table checkpoint SQL

Hello,

I am using the Database table checkpoints and I cannot find how to edit or view the Custom SQL query.

So let's say I did the test:  Select * from Table1 

but forgot to add "where EmployeeID = id", the only way I found to add it after the checkpoint was created is to create another checkpoint, and re-doing the SQL connection string.

I would prefer to edit the existing query. Is it possible?

Thanks