How to access product’s meta data when deleting a WooCommerce product?

Question

Finally got this working.

add_action('before_delete_post', 'removeCheckDetail', 10, 1 );
function removeCheckDetail( $order_id ) {

global $woocommerce; 
global $wpdb; 

$order = new WC_Order($order_id);
$order_items = $order->get_items(); 

// Loop through order line items
foreach( $order_items as $item_id => $item ) {

   $url = $item->get_meta('Check Detail');  

   parse_str( parse_url( $url, PHP_URL_QUERY), $array );

   $key = strstr($array['ck_item'], '"', true);

   $wpdb->check_detail = "{$wpdb->prefix}check_detail";

   $wpdb->delete($wpdb->check_detail, array('cart_item_key' => $key));
 }

}