WooCommerce Get All orders IDs for a given product ID.

WooCommerce.php

/**
     * Get All orders IDs for a given product ID.
     *
     * @param integer $product_id   (required)
     * @param array   $order_status (optional) Default is 'wc-completed'
     *
     * @return array
     */
    public function getOrderIdsByProductId($product_id, $order_status = ['wc-completed', 'wc-processing']) {
        global $wpdb;
        $query = "
        SELECT order_items.order_id
        FROM {$wpdb->prefix}woocommerce_order_items as order_items
        LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta ON order_items.order_item_id = order_item_meta.order_item_id
        LEFT JOIN {$wpdb->posts} AS posts ON order_items.order_id = posts.ID
        WHERE posts.post_type = 'shop_order'
        AND posts.post_status IN ( '" . implode("','", $order_status) . "' )
        AND order_items.order_item_type = 'line_item'
        AND order_item_meta.meta_key = '_product_id'
        AND order_item_meta.meta_value = '$product_id'
    ";
        return $wpdb->get_col($query);
    }