I noticed that the implementation of getSequenceNextval() in AbstractSqlService is specific to Oracle.
The class is abstract, so there is no need to implement every method. Of course someone could say that the implementor of a driver specific class, has to implement it.
From my point of view it could be considered as a bug, and i started to file it as such on bugzilla to record the fact for some time later(Perhaps when i will manage to use the Git, or someone else will bother to change it), but i would like to ask for your opinion.
Yes, you're absolutely right. This method should be abstract so it won't be forgotten to overwrite if the Driver implementation is written. Please do open a bug for this and consider this a free-pass to open a bug for any similar issue.