SET NAMES utf8mb4 COLLATE utf8mb4_unicode_ci;

ALTER TABLE task_definitions
  ADD COLUMN reward_asset_type VARCHAR(32) NOT NULL DEFAULT 'COIN' COMMENT '奖励资产类型：COIN/POINT' AFTER reward_coin_amount;

ALTER TABLE user_task_progress
  ADD COLUMN reward_asset_type VARCHAR(32) NOT NULL DEFAULT 'COIN' COMMENT '奖励资产类型快照：COIN/POINT' AFTER reward_coin_amount;

ALTER TABLE task_reward_claims
  ADD COLUMN reward_asset_type VARCHAR(32) NOT NULL DEFAULT 'COIN' COMMENT '奖励资产类型快照：COIN/POINT' AFTER reward_coin_amount;
