Plugin not compatible with WooCommerce new DB schema

Hi!

WooCommerce has introduced a new storage model for orders called High-Performance Order Storage. It will reduce order creation from at least 50 queries to just 3. Unfortunately, this plugin is not compatible with HPOS.

I don’t know if you are aware that this change renders your plugin incompatible with shops that use this DB schema. And that, starting in August this year, all new shops will use it!

To make the plugin compatible with HPOS you need to use the WC-specific CRUD classes and instead of accessing wp_postmeta directly. And compatibility must be declared.

There is a guide on how to upgrade to HPOS: https://github.com/woocommerce/woocommerce/wiki/High-Performance-Order-Storage-Upgrade-Recipe-Book

Thanks for your kind support