DummyClientNoticeSender implements the tree.ClientNoticeSender interface.

DummyEvalPlanner implements the tree.EvalPlanner interface by returning errors.

DummyPrivilegedAccessor implements the tree.PrivilegedAccessor interface by returning errors.

DummySequenceOperators implements the tree.SequenceOperators interface by returning errors.

DummySessionAccessor implements the tree.EvalSessionAccessor interface by returning errors.

DummyTenantOperator implements the tree.TenantOperator interface.