63 lines
4.5 KiB
SQL
63 lines
4.5 KiB
SQL
-- Split message body by conversation type. Snowflake MsgId remains PK / sort / sync cursor.
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CREATE TABLE IF NOT EXISTS private_message (
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id BIGINT PRIMARY KEY COMMENT 'Snowflake MsgId，主键、排序键、同步游标',
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conversation_id BIGINT NOT NULL COMMENT '所属单聊会话 id',
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sender_id BIGINT NOT NULL COMMENT '发送者 user_id；系统消息为 0',
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receiver_id BIGINT NOT NULL DEFAULT 0 COMMENT '接收者 user_id；系统消息为 0',
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client_msg_id VARCHAR(64) NOT NULL COMMENT '客户端消息 id，与 sender+会话 组成幂等键',
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message_type SMALLINT NOT NULL COMMENT '消息类型：1文本 2图片 3语音 4视频 5表情 6GIF 7文件 8位置 9系统',
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content BLOB NOT NULL COMMENT '序列化后的消息体（JSON 字节），禁止存原始 string；媒体只存对象存储 key',
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status TINYINT NOT NULL DEFAULT 1 COMMENT '1=正常 2=已撤回 3=审核隐藏',
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created_at DATETIME(3) NOT NULL COMMENT '服务端入库时间',
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UNIQUE KEY uk_sender_conv_client_msg (sender_id, conversation_id, client_msg_id),
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KEY idx_conversation_id (conversation_id, id),
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KEY idx_receiver_id (receiver_id, id)
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) COMMENT='单聊消息正文。PK=MsgId；与 group_message 分表存储';
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CREATE TABLE IF NOT EXISTS group_message (
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id BIGINT PRIMARY KEY COMMENT 'Snowflake MsgId，主键、排序键、同步游标',
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conversation_id BIGINT NOT NULL COMMENT '所属群会话 id',
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group_id BIGINT NOT NULL DEFAULT 0 COMMENT '群号 groups.id，便于按群查询',
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sender_id BIGINT NOT NULL COMMENT '发送者 user_id；系统消息为 0',
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client_msg_id VARCHAR(64) NOT NULL COMMENT '客户端消息 id，与 sender+会话 组成幂等键',
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message_type SMALLINT NOT NULL COMMENT '消息类型：1文本 2图片 3语音 4视频 5表情 6GIF 7文件 8位置 9系统',
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content BLOB NOT NULL COMMENT '序列化后的消息体（JSON 字节），禁止存原始 string；媒体只存对象存储 key',
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status TINYINT NOT NULL DEFAULT 1 COMMENT '1=正常 2=已撤回 3=审核隐藏',
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created_at DATETIME(3) NOT NULL COMMENT '服务端入库时间',
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UNIQUE KEY uk_sender_conv_client_msg (sender_id, conversation_id, client_msg_id),
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KEY idx_conversation_id (conversation_id, id),
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KEY idx_group_id (group_id, id)
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) COMMENT='群聊消息正文。PK=MsgId；群热路径不写 MySQL inbox 行';
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CREATE TABLE IF NOT EXISTS messages (
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id BIGINT PRIMARY KEY COMMENT 'Snowflake MsgId，主键、排序键、同步游标',
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conversation_id BIGINT NOT NULL COMMENT '所属会话 id',
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sender_id BIGINT NOT NULL COMMENT '发送者 user_id',
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client_msg_id VARCHAR(64) NOT NULL COMMENT '客户端消息 id，与 sender+会话 组成幂等键',
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message_type SMALLINT NOT NULL COMMENT '消息类型：1文本 2图片 3语音 4视频 5表情 6GIF 7文件 8位置 9系统',
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content BLOB NOT NULL COMMENT '序列化后的消息体（JSON 字节），禁止存原始 string；媒体只存对象存储 key',
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status TINYINT NOT NULL DEFAULT 1 COMMENT '1=正常 2=已撤回 3=审核隐藏',
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created_at DATETIME(3) NOT NULL COMMENT '服务端入库时间',
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UNIQUE KEY uk_sender_conv_client_msg (sender_id, conversation_id, client_msg_id),
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KEY idx_conversation_id (conversation_id, id)
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) COMMENT='迁移中转表。0011 拷贝到 private_message / group_message 后删除';
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INSERT IGNORE INTO private_message (id, conversation_id, sender_id, client_msg_id, message_type, content, status, created_at)
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SELECT m.id, m.conversation_id, m.sender_id, m.client_msg_id, m.message_type, m.content, m.status, m.created_at
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FROM messages m
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INNER JOIN conversations c ON c.id = m.conversation_id AND c.type = 1;
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INSERT IGNORE INTO group_message (id, conversation_id, sender_id, client_msg_id, message_type, content, status, created_at)
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SELECT m.id, m.conversation_id, m.sender_id, m.client_msg_id, m.message_type, m.content, m.status, m.created_at
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FROM messages m
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INNER JOIN conversations c ON c.id = m.conversation_id AND c.type = 2;
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INSERT IGNORE INTO private_message (id, conversation_id, sender_id, client_msg_id, message_type, content, status, created_at)
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SELECT m.id, m.conversation_id, m.sender_id, m.client_msg_id, m.message_type, m.content, m.status, m.created_at
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FROM messages m
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LEFT JOIN conversations c ON c.id = m.conversation_id
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WHERE c.id IS NULL;
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DROP TABLE IF EXISTS messages;
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