presto-main/src/main/java/io/prestosql/operator/DeleteOperator.java/DeleteOperator/createOperator
class DeleteOperator:        @Override
        public Operator createOperator(DriverContext driverContext)
        {
            checkState(!closed, "Factory is already closed");
            OperatorContext context = driverContext.addOperatorContext(operatorId, planNodeId, DeleteOperator.class.getSimpleName());
            return new DeleteOperator(context, rowIdChannel);
        }