wpdb->get_charset_collate(); $sql = "CREATE TABLE IF NOT EXISTS `{$table_name}` ( `id` bigint unsigned AUTO_INCREMENT NOT NULL PRIMARY KEY, `message_id` char(36) NOT NULL, `automation_id` bigint unsigned NOT NULL, `customer_id` bigint unsigned NULL, `recipient_email` varchar(255) NOT NULL, `dispatched_at` datetime NOT NULL, `opened_at` datetime NULL, `clicked_at` datetime NULL, UNIQUE (`message_id`), INDEX (`automation_id`), INDEX (`customer_id`) ) {$charset_collate}"; return $this->wpdb->query( $sql ); } }