InstallSchema -> Add rows to the catalog_product_entity table

[like_mike]

is this possible?

i get no new row in the catalog_product_entity table - the other entrys in the tables works...

<?php

namespace MyVendor\MyModule\Setup;

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

class InstallSchema implements InstallSchemaInterface
{

    /**
     * Install
     *
     * @param SchemaSetupInterface $setup
     * @param ModuleContextInterface $context
     */
    public function install(
        SchemaSetupInterface $setup,
        ModuleContextInterface $context
    )
    {
        $installer = $setup;
        $installer->startSetup();

        /* quote table */
        $installer->getConnection()->addColumn(
            $installer->getTable('quote_item'),
            'rendering_id',
            [
                'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                'nullable' => true,
                'comment' => 'Rendering ID',
            ]
        );

        /* sales_order table */
        $installer->getConnection()->addColumn(
            $installer->getTable('sales_order_item'),
            'rendering_id',
            [
                'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                'nullable' => true,
                'comment' => 'Rendering ID',
            ]
        );

        /* catalog_product_entity table */
        $installer->getConnection()->addColumn(
            $installer->getTable('catalog_product_entity'),
            'rendering_id',
            [
                'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                'nullable' => true,
                'comment' => 'Rendering ID',
            ]
        );

        /* quote table */
        $installer->getConnection()->addColumn(
            $installer->getTable('quote_item'),
            'filename',
            [
                'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                'nullable' => true,
                'comment' => 'Filename',
            ]
        );

        /* sales_order table */
        $installer->getConnection()->addColumn(
            $installer->getTable('sales_order_item'),
            'filename',
            [
                'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                'nullable' => true,
                'comment' => 'Filename',
            ]
        );

        /* catalog_product_entity table */
        $installer->getConnection()->addColumn(
            $installer->getTable('catalog_product_entity'),
            'filename',
            [
                'type' => \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
                'nullable' => true,
                'comment' => 'Filename',
            ]
        );
        
        $setup->endSetup();
    }
}

[theMageComp]

You Need to use Install_data files for altering existing table of magento.

here is the code 

<?php

namespace Vendor\Extension\Setup;

use Magento\Catalog\Setup\CategorySetupFactory;
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\InstallDataInterface;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;

class InstallData implements InstallDataInterface
{
    private $eavSetupFactory;
    private $categorySetupFactory;

    public function __construct( EavSetupFactory $eavSetupFactory, CategorySetupFactory $categorySetupFactory )
    {
        $this->eavSetupFactory = $eavSetupFactory;
        $this->categorySetupFactory = $categorySetupFactory;
    }

    public function install( ModuleDataSetupInterface $setup, ModuleContextInterface $context )
    {
        $setup->startSetup();
        $eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);

        // Product Attribute

        $eavSetup->addAttribute(
            \Magento\Catalog\Model\Product::ENTITY,
            'recored',
            [
                'type' => 'varchar',
                'label' => 'Recored',
                'input' => 'multiselect',
                'source' => \Vendor\Extension\Model\Product\Attribute\Source\Citys::class,
                'backend' => \Magento\Eav\Model\Entity\Attribute\Backend\ArrayBackend::class,
                'required' => false,
                'sort_order' => 50,
                'global' => \Magento\Eav\Model\Entity\Attribute\ScopedAttributeInterface::SCOPE_STORE,
                'group' => 'Product Details',
                'is_used_in_grid' => true,
                'is_visible_in_grid' => false,
                'is_filterable_in_grid' => false
            ]
        );

        $setup->endSetup();
    }
}