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_script/add_authorization_fields.sql

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+-- 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;
+

_script/add_authorization_fields_simple.sql

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+-- 为 pla_account 表添加授权相关字段（简化版）
+-- 执行时间：2025-01-XX
+-- 说明：如果字段已存在会报错，可以先执行上面的版本（带检查的版本）
+
+-- 添加授权日期字段
+ALTER TABLE `pla_account` 
+ADD COLUMN `authorization_date` DATETIME NULL COMMENT '授权日期（授权开始时间）' AFTER `active_actions`;
+
+-- 添加授权天数字段
+ALTER TABLE `pla_account` 
+ADD COLUMN `authorization_days` INT(11) NOT NULL DEFAULT 0 COMMENT '授权天数' AFTER `authorization_date`;
+