Magento 2 Cómo crear un nuevo atributo de pedido mediante programación

He estado buscando en la web cómo crear un atributo de pedido (si así se llama), esencialmente solo quiero que aparezca una nueva columna de base de datos en la base de datos sales_order, obviamente podría crearla manualmente, pero hay una forma de crearla a través de un script de actualización / programáticamente?

Prácticamente, hay dos formas principales de agregar un atributo de pedido (una nueva columna) para ordenar a través de un script de actualización.

- Usando $ setup-> getConnection () -> addColumn ()

app / code / Vendor / SalesOrder / Setup / UpgradeSchema.php

<?php

namespace Vendor\SalesOrder\Setup;

use Magento\Framework\Setup\UpgradeSchemaInterface;
use Magento\Framework\Setup\SchemaSetupInterface;
use Magento\Framework\Setup\ModuleContextInterface;

class UpgradeSchema implements UpgradeSchemaInterface
{
    /**
     * Upgrades DB schema for a module
     *
     * @param SchemaSetupInterface $setup
     * @param ModuleContextInterface $context
     * @return void
     */
    public function upgrade(SchemaSetupInterface $setup, ModuleContextInterface $context)
    {
        $setup->startSetup();

        $quote = 'quote';
        $orderTable = 'sales_order';

        $setup->getConnection()
            ->addColumn(
                $setup->getTable($quote),
                'custom_attribute',
                [
                    'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                    'length' => 255,
                    'comment' =>'Custom Attribute'
                ]
            );
        //Order table
        $setup->getConnection()
            ->addColumn(
                $setup->getTable($orderTable),
                'custom_attribute',
                [
                    'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                    'length' => 255,
                    'comment' =>'Custom Attribute'
                ]
            );

        $setup->endSetup();
    }
}

- Uso de la configuración de cotización y venta de fábrica

app / code / Vendor / SalesOrder / Setup / UpgradeData.php

<?php

namespace Vendor\SalesOrder\Setup;

use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Framework\Setup\UpgradeDataInterface;
use Magento\Quote\Setup\QuoteSetupFactory;
use Magento\Sales\Setup\SalesSetupFactory;

class UpgradeData implements UpgradeDataInterface
{
    /**
     * @var QuoteSetupFactory
     */
    protected $quoteSetupFactory;

    /**
     * @var SalesSetupFactory
     */
    protected $salesSetupFactory;

    /**
     * @param QuoteSetupFactory $quoteSetupFactory
     * @param SalesSetupFactory $salesSetupFactory
     */
    public function __construct(
        QuoteSetupFactory $quoteSetupFactory,
        SalesSetupFactory $salesSetupFactory
    ) {
        $this->quoteSetupFactory = $quoteSetupFactory;
        $this->salesSetupFactory = $salesSetupFactory;
    }
    /**
     * Upgrades DB for a module
     *
     * @param ModuleDataSetupInterface $setup
     * @param ModuleContextInterface $context
     * @return void
     */
    public function upgrade(ModuleDataSetupInterface $setup, ModuleContextInterface $context)
    {
        /** @var \Magento\Quote\Setup\QuoteSetup $quoteInstaller */
        $quoteInstaller = $this->quoteSetupFactory->create(['resourceName' => 'quote_setup', 'setup' => $setup]);

        /** @var \Magento\Sales\Setup\SalesSetup $salesInstaller */
        $salesInstaller = $this->salesSetupFactory->create(['resourceName' => 'sales_setup', 'setup' => $setup]);

        $setup->startSetup();

        //Add multiple attributes to quote 
        $entityAttributesCodes = [
            'custom_attribute' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
            'custom_attribute1' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT

        ];

        foreach ($entityAttributesCodes as $code => $type) {

            $quoteInstaller->addAttribute('quote', $code, ['type' => $type, 'length'=> 255, 'visible' => false, 'nullable' => true,]);
             $salesInstaller->addAttribute('order', $code, ['type' => $type, 'length'=> 255, 'visible' => false,'nullable' => true,]);
            $salesInstaller->addAttribute('invoice', $code, ['type' => $type, 'length'=> 255, 'visible' => false, 'nullable' => true,]);
        }

        $setup->endSetup();
    }
}