Action Hook: When updating this object, to prevent infinite loops, use $wpdb to update data, since wp_update_post spawns more calls to the save_post action.
Source: includes/data-stores/class-wc-coupon-data-store-cpt.php:192
Class: WC Coupon Data Store: Custom Post Type.
Source: includes/data-stores/class-wc-coupon-data-store-cpt.php:17
Method: Method to create a new coupon in the database.
Source: includes/data-stores/class-wc-coupon-data-store-cpt.php:71
Filter Hook: In some cases, specifically when there is a combined index on post_id,meta_key, the insert statement above could end up in a deadlock.
Source: includes/data-stores/class-wc-coupon-data-store-cpt.php:608