30 lines
1.2 KiB
SQL
30 lines
1.2 KiB
SQL
-- Outbox identity: every queued event carries a stable id; handlers claim
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-- (event_id, handler) pairs so redeliveries are skipped and concurrent
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-- deliveries never run the same handler twice.
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ALTER TABLE event_queue ADD COLUMN event_id TEXT;
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-- When the current claim started; a claim older than the lease is reclaimable.
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ALTER TABLE event_queue ADD COLUMN claimed_at TEXT;
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-- Legacy rows get a random v4-shaped uuid. The subquery references the row id
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-- so it is re-evaluated per row rather than cached.
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UPDATE event_queue SET event_id = (
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SELECT lower(
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substr(h, 1, 8) || '-' || substr(h, 9, 4) || '-4' || substr(h, 14, 3) || '-'
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|| substr('89ab', (abs(random()) % 4) + 1, 1) || substr(h, 18, 3) || '-' || substr(h, 21, 12)
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)
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FROM (SELECT hex(randomblob(16)) AS h, event_queue.id AS row_id)
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);
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CREATE UNIQUE INDEX idx_event_queue_event_id
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ON event_queue (event_id) WHERE event_id IS NOT NULL;
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CREATE TABLE processed_events (
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event_id TEXT NOT NULL,
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handler TEXT NOT NULL,
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status TEXT NOT NULL CHECK (status IN ('in_progress', 'done')),
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started_at TEXT,
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processed_at TEXT NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%SZ', 'now')),
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PRIMARY KEY (event_id, handler)
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);
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