195 lines
6.3 KiB
Transact-SQL
195 lines
6.3 KiB
Transact-SQL
-- ==========================================
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-- 消息系统重构数据迁移脚本
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-- 执行时间：建议在业务低峰期执行
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-- 注意：此脚本会删除关注消息数据，不考虑历史数据
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-- ==========================================
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BEGIN TRANSACTION;
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-- 步骤1：备份现有数据（可选，建议执行）
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PRINT '==========================================';
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PRINT '步骤1：备份现有消息数据...';
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PRINT '==========================================';
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IF OBJECT_ID('T_Messages_Backup_BeforeRefactor', 'U') IS NOT NULL
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BEGIN
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DROP TABLE T_Messages_Backup_BeforeRefactor;
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PRINT '已删除旧的备份表';
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END
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SELECT * INTO T_Messages_Backup_BeforeRefactor FROM T_Messages;
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PRINT '备份完成，备份表：T_Messages_Backup_BeforeRefactor';
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PRINT '';
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-- 步骤2：删除关注消息（MessageType = 3）
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PRINT '==========================================';
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PRINT '步骤2：删除关注消息（MessageType = 3）...';
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PRINT '==========================================';
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DECLARE @DeletedFollowCount INT;
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SELECT @DeletedFollowCount = COUNT(*) FROM T_Messages WHERE MessageType = 3;
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PRINT '待删除关注消息数量：' + CAST(@DeletedFollowCount AS NVARCHAR(10));
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DELETE FROM T_Messages WHERE MessageType = 3;
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PRINT '已删除关注消息';
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PRINT '';
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-- 步骤3：调整系统通知类型：4 → 3
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PRINT '==========================================';
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PRINT '步骤3：调整系统通知类型（4 → 3）...';
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PRINT '==========================================';
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DECLARE @SystemNotificationCount INT;
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SELECT @SystemNotificationCount = COUNT(*) FROM T_Messages WHERE MessageType = 4;
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PRINT '待调整系统通知数量：' + CAST(@SystemNotificationCount AS NVARCHAR(10));
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UPDATE T_Messages SET MessageType = 3 WHERE MessageType = 4;
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PRINT '已将系统通知类型从 4 调整为 3';
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PRINT '';
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-- 步骤4：增加"我的评论内容"字段
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PRINT '==========================================';
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PRINT '步骤4：增加 MyCommentContent 字段...';
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PRINT '==========================================';
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IF NOT EXISTS (
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SELECT * FROM sys.columns
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WHERE object_id = OBJECT_ID(N'dbo.T_Messages')
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AND name = 'MyCommentContent'
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)
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BEGIN
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ALTER TABLE T_Messages
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ADD MyCommentContent NVARCHAR(MAX) NULL;
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PRINT '已添加 MyCommentContent 字段（NVARCHAR(MAX) NULL）';
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-- 添加字段注释
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EXEC sp_addextendedproperty
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@name = N'MS_Description',
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@value = N'我的评论内容（回复消息展示被回复的内容）',
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@level0type = N'SCHEMA', @level0name = N'dbo',
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@level1type = N'TABLE', @level1name = N'T_Messages',
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@level2type = N'COLUMN', @level2name = N'MyCommentContent';
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PRINT '已添加字段注释';
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END
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ELSE
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BEGIN
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PRINT 'MyCommentContent 字段已存在，跳过添加';
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END
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PRINT '';
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-- 步骤5：更新字段注释
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PRINT '==========================================';
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PRINT '步骤5：更新字段注释...';
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PRINT '==========================================';
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-- 更新 MessageType 字段注释
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IF EXISTS (
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SELECT * FROM sys.extended_properties
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WHERE major_id = OBJECT_ID('dbo.T_Messages')
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AND name = 'MS_Description'
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AND minor_id = (SELECT column_id FROM sys.columns WHERE object_id = OBJECT_ID('dbo.T_Messages') AND name = 'MessageType')
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)
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BEGIN
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EXEC sp_updateextendedproperty
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@name = N'MS_Description',
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@value = N'消息类型：1-回复消息，2-点赞消息（含送花），3-系统消息',
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@level0type = N'SCHEMA', @level0name = N'dbo',
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@level1type = N'TABLE', @level1name = N'T_Messages',
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@level2type = N'COLUMN', @level2name = N'MessageType';
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PRINT '已更新 MessageType 字段注释';
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END
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ELSE
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BEGIN
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EXEC sp_addextendedproperty
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@name = N'MS_Description',
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@value = N'消息类型：1-回复消息，2-点赞消息（含送花），3-系统消息',
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@level0type = N'SCHEMA', @level0name = N'dbo',
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@level1type = N'TABLE', @level1name = N'T_Messages',
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@level2type = N'COLUMN', @level2name = N'MessageType';
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PRINT '已添加 MessageType 字段注释';
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END
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-- 更新 ContentType 字段注释
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IF EXISTS (
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SELECT * FROM sys.extended_properties
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WHERE major_id = OBJECT_ID('dbo.T_Messages')
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AND name = 'MS_Description'
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AND minor_id = (SELECT column_id FROM sys.columns WHERE object_id = OBJECT_ID('dbo.T_Messages') AND name = 'ContentType')
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)
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BEGIN
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EXEC sp_updateextendedproperty
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@name = N'MS_Description',
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@value = N'内容类型：1-帖子，2-评论，3-送花',
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@level0type = N'SCHEMA', @level0name = N'dbo',
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@level1type = N'TABLE', @level1name = N'T_Messages',
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@level2type = N'COLUMN', @level2name = N'ContentType';
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PRINT '已更新 ContentType 字段注释';
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END
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ELSE
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BEGIN
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EXEC sp_addextendedproperty
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@name = N'MS_Description',
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@value = N'内容类型：1-帖子，2-评论，3-送花',
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@level0type = N'SCHEMA', @level0name = N'dbo',
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@level1type = N'TABLE', @level1name = N'T_Messages',
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@level2type = N'COLUMN', @level2name = N'ContentType';
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PRINT '已添加 ContentType 字段注释';
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END
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PRINT '';
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-- 步骤6：验证结果
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PRINT '==========================================';
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PRINT '步骤6：验证迁移结果...';
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PRINT '==========================================';
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PRINT '当前消息类型统计：';
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SELECT
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MessageType,
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CASE MessageType
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WHEN 1 THEN '回复消息'
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WHEN 2 THEN '点赞消息'
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WHEN 3 THEN '系统消息'
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ELSE '未知类型'
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END AS TypeName,
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COUNT(*) as Count
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FROM T_Messages
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GROUP BY MessageType
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ORDER BY MessageType;
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PRINT '';
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PRINT '内容类型统计：';
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SELECT
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ContentType,
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CASE ContentType
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WHEN 0 THEN '无内容'
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WHEN 1 THEN '帖子'
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WHEN 2 THEN '评论'
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WHEN 3 THEN '送花'
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ELSE '其他'
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END AS TypeName,
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COUNT(*) as Count
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FROM T_Messages
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GROUP BY ContentType
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ORDER BY ContentType;
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PRINT '';
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PRINT '==========================================';
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PRINT '数据迁移完成！';
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PRINT '==========================================';
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PRINT '';
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PRINT '提示：';
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PRINT '1. 请在应用层清理 Redis 队列：DEL message:events:follow';
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PRINT '2. 如需回滚，可从备份表 T_Messages_Backup_BeforeRefactor 恢复';
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PRINT '3. 备份表可在确认无误后手动删除';
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PRINT '';
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COMMIT TRANSACTION;
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PRINT '事务已提交';
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