Verify how AutoCommit = off works

[lostbard]

Currently, on setting autocommit = off, I effectively run a "begin" statement.
On setting off, it verifies there are no other committable statements before calling rollback - unless there are - then it will error.

On calling commit or rollback, the autocommit flags goes back of "on".

Not sure what matlab does - so need to verify to make how it works compatible

[lostbard]

Requires someone with access to matlab to run a test script for me.