17 lines
1 KiB
SQL
17 lines
1 KiB
SQL
-- sendMultiMedia 必须在解析上传媒体、逐条发送之前持久预留 grouped_id。
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-- 这张表把每个发送 random_id 固定到会话作用域内的相册组，使中途失败后
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-- 客户端只重试失败子集时仍能恢复首次整包使用的 grouped_id；intent_hash
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-- 同时阻止内容已改变的相同 random_id 借旧预留错误合并。
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CREATE TABLE album_group_reservations (
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sender_user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
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peer_type TEXT NOT NULL CHECK (peer_type IN ('user', 'channel')),
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peer_id BIGINT NOT NULL CHECK (peer_id > 0),
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random_id BIGINT NOT NULL CHECK (random_id <> 0),
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intent_hash BYTEA NOT NULL CHECK (octet_length(intent_hash) = 32),
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grouped_id BIGINT NOT NULL CHECK (grouped_id <> 0),
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created_at TIMESTAMPTZ NOT NULL DEFAULT now(),
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PRIMARY KEY (sender_user_id, peer_type, peer_id, random_id)
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);
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COMMENT ON TABLE album_group_reservations IS
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'Durable pre-send binding from album item random_id to grouped_id; never reconstructed from a retry subset.';
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