zhenyi
14 lines
390 B
SQL
14 lines
390 B
SQL
ALTER TABLE message ADD COLUMN IF NOT EXISTS seq BIGINT NOT NULL DEFAULT 0;
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WITH ranked AS (
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SELECT id, ROW_NUMBER() OVER (PARTITION BY channel_id ORDER BY created_at ASC, id ASC) AS rn
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FROM message
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WHERE seq = 0
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)
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UPDATE message m
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SET seq = ranked.rn
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FROM ranked
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WHERE m.id = ranked.id;
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CREATE UNIQUE INDEX IF NOT EXISTS idx_message_channel_seq ON message (channel_id, seq);
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