newsupernova/vendor/magento/module-inventory-reservations/etc/db_schema.xml

<?xml version="1.0"?>
<!--
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
-->
<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
    <table name="inventory_reservation" resource="default" engine="innodb">
        <column xsi:type="int" name="reservation_id" padding="10" unsigned="true" nullable="false" identity="true"/>
        <column xsi:type="int" name="stock_id" padding="10" unsigned="true" nullable="false" identity="false"/>
        <column xsi:type="varchar" name="sku" nullable="false" length="64"/>
        <column xsi:type="decimal" name="quantity" scale="4" precision="10" unsigned="false" nullable="false"
                default="0"/>
        <column xsi:type="varchar" name="metadata" nullable="true" length="255"/>
        <constraint xsi:type="primary" referenceId="PRIMARY">
            <column name="reservation_id"/>
        </constraint>
        <index referenceId="INVENTORY_RESERVATION_STOCK_ID_SKU_QUANTITY" indexType="btree">
            <column name="stock_id"/>
            <column name="sku"/>
            <column name="quantity"/>
        </index>
    </table>
</schema>