-- 为 pla_account 表添加授权相关字段
-- 执行时间：2025-01-XX
-- 说明：添加授权日期和授权天数字段，用于控制账号的使用期限

-- 检查并添加授权日期字段
SET @dbname = DATABASE();
SET @tablename = 'pla_account';
SET @columnname = 'authorization_date';
SET @preparedStatement = (SELECT IF(
  (
    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
    WHERE
      (TABLE_SCHEMA = @dbname)
      AND (TABLE_NAME = @tablename)
      AND (COLUMN_NAME = @columnname)
  ) > 0,
  'SELECT 1', -- 字段已存在，不执行任何操作
  CONCAT('ALTER TABLE `', @tablename, '` ADD COLUMN `', @columnname, '` DATETIME NULL COMMENT ''授权日期（授权开始时间）'' AFTER `active_actions`;')
));
PREPARE alterIfNotExists FROM @preparedStatement;
EXECUTE alterIfNotExists;
DEALLOCATE PREPARE alterIfNotExists;

-- 检查并添加授权天数字段
SET @columnname = 'authorization_days';
SET @preparedStatement = (SELECT IF(
  (
    SELECT COUNT(*) FROM INFORMATION_SCHEMA.COLUMNS
    WHERE
      (TABLE_SCHEMA = @dbname)
      AND (TABLE_NAME = @tablename)
      AND (COLUMN_NAME = @columnname)
  ) > 0,
  'SELECT 1', -- 字段已存在，不执行任何操作
  CONCAT('ALTER TABLE `', @tablename, '` ADD COLUMN `', @columnname, '` INT(11) NOT NULL DEFAULT 0 COMMENT ''授权天数'' AFTER `authorization_date`;')
));
PREPARE alterIfNotExists FROM @preparedStatement;
EXECUTE alterIfNotExists;
DEALLOCATE PREPARE alterIfNotExists;

-- 验证字段是否添加成功
SELECT 
    COLUMN_NAME AS '字段名',
    DATA_TYPE AS '数据类型',
    IS_NULLABLE AS '允许NULL',
    COLUMN_DEFAULT AS '默认值',
    COLUMN_COMMENT AS '注释'
FROM INFORMATION_SCHEMA.COLUMNS 
WHERE TABLE_SCHEMA = DATABASE() 
  AND TABLE_NAME = 'pla_account' 
  AND COLUMN_NAME IN ('authorization_date', 'authorization_days')
ORDER BY ORDINAL_POSITION;