catalog not transactional, at least for operators

[duncand]

The Dataphor catalog does not seem to be transactional, that is, "create operator" statement is not subject to an explicit transaction.

BeginTransaction();

create operator Foo() : Integer
begin
    result := 42;
end;

select Foo();

RollbackTransaction();

Running that once succeeds and outputs 42. Running it a second time dies citing that Foo() already exists. This means that the creation of operator Foo() was not undone by the transaction rollback as it should have been.

That behaviour is the same for both "session" and non-"session" creates.

Data definition should be subject to transactions.