ALTER TABLE pp_log ADD COLUMN `action` VARCHAR(100) NULL DEFAULT NULL AFTER `id`;
ALTER TABLE pp_log ADD COLUMN `order_id` INT NULL DEFAULT NULL AFTER `action`;
ALTER TABLE pp_log ADD COLUMN `context` TEXT NULL DEFAULT NULL AFTER `message`;
ALTER TABLE pp_log ADD INDEX `idx_action` (`action`);
ALTER TABLE pp_log ADD INDEX `idx_order_id` (`order_id`);