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22 lines
1.0 KiB
SQL
22 lines
1.0 KiB
SQL
CREATE TABLE IF NOT EXISTS chat_message_mentions (
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room_id BIGINT NOT NULL,
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message_id BIGINT NOT NULL,
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message_created_at TIMESTAMPTZ NOT NULL,
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mentioned_user_id BIGINT NOT NULL,
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start_char INTEGER NOT NULL,
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length_chars INTEGER NOT NULL,
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created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
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PRIMARY KEY (room_id, message_id, message_created_at, start_char, mentioned_user_id),
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CHECK (start_char >= 0),
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CHECK (length_chars > 0),
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FOREIGN KEY (room_id) REFERENCES rooms(id) ON DELETE CASCADE,
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FOREIGN KEY (mentioned_user_id) REFERENCES users(id) ON DELETE CASCADE,
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FOREIGN KEY (room_id, message_id, message_created_at)
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REFERENCES chat_messages(room_id, id, created_at) ON DELETE CASCADE
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);
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CREATE INDEX IF NOT EXISTS idx_chat_message_mentions_user
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ON chat_message_mentions(room_id, mentioned_user_id, created_at DESC);
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CREATE INDEX IF NOT EXISTS idx_chat_message_mentions_message
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ON chat_message_mentions(message_id, message_created_at, start_char, mentioned_user_id);
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