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Fix schema delta error in 1.85 (#15738)

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There appears to be a race where you can end up with entries in
`event_push_summary` with both a `NULL` and `main` thread ID.

Fixes #15736

Introduced in #15597
This commit is contained in:
Erik Johnston 2023-06-07 10:50:32 +01:00 committed by GitHub
parent ec71214243
commit a701c089fa
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changelog.d/15738.bugfix Normal file
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@ -0,0 +1 @@
Fix bug in schema delta that broke upgrades for some deployments. Introduced in v1.85.0.

8
synapse/storage/schema/main/delta/77/05thread_notifications_backfill.sql
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@ -21,6 +21,14 @@ DELETE FROM background_updates WHERE update_name = 'event_push_backfill_thread_i
-- Overwrite any null thread_id values.
UPDATE event_push_actions_staging SET thread_id = 'main' WHERE thread_id IS NULL;
UPDATE event_push_actions SET thread_id = 'main' WHERE thread_id IS NULL;
-- Empirically we can end up with entries in the push summary table with both a
-- `NULL` and `main` thread ID, which causes the update below to fail. We fudge
-- this by deleting any `NULL` rows that have a corresponding `main`.
DELETE FROM event_push_summary AS a WHERE thread_id IS NULL AND EXISTS (
SELECT 1 FROM event_push_summary AS b
WHERE b.thread_id = 'main' AND a.user_id = b.user_id AND a.room_id = b.room_id
);
UPDATE event_push_summary SET thread_id = 'main' WHERE thread_id IS NULL;
-- Drop the background updates to calculate the indexes used to find null thread_ids.