bd9a6bd257
0012_crawler.sql's partial index on `state IN ('pending','failed')`
indexes a state that no code path ever writes — ack_failed in
crawler/jobs.rs only ever moves jobs to 'dead' or 'pending'. The
'failed' branch costs a write on every state change without ever
matching a query. Drop it; the CHECK still allows 'failed' so a
future migration can re-introduce it cleanly.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
16 lines
640 B
SQL
16 lines
640 B
SQL
-- The original 0012 partial index covers `state IN ('pending','failed')`,
|
|
-- but `ack_failed` in src/crawler/jobs.rs only writes `dead` or
|
|
-- `pending` — `failed` is never set. The index branch on `failed`
|
|
-- never matches any row, so it's dead weight on every write.
|
|
--
|
|
-- Drop and recreate the index without the dead branch. The CHECK
|
|
-- constraint on `state` still allows `'failed'` so a future migration
|
|
-- can adopt that terminal-but-retryable state without a second
|
|
-- schema change.
|
|
|
|
DROP INDEX IF EXISTS crawler_jobs_ready_idx;
|
|
|
|
CREATE INDEX crawler_jobs_ready_idx
|
|
ON crawler_jobs (scheduled_at)
|
|
WHERE state = 'pending';
|