analytics/check-replicas.sql.eex at 8ba2b934b36993c8a9e9281ffde770821166ac15 - analytics - gitea: Gitea Service

plausible/analytics

mirror of https://github.com/plausible/analytics.git synced 2024-12-25 02:24:55 +03:00

Karl-Aksel Puulmann 8ba2b934b3

Add data migration for moving sessions_v2 table to VersionedCollapsingMergeTree (#3802 )

* Add data migration for moving to VersionedCollapsingMergeTree

This has been tested locally and partially on staging. Still requires a bit of work to verify.

Verification query:

```
SELECT main._partition_id, tmp.count, main.count
FROM (
SELECT _partition_id, count() AS count
FROM sessions_v2_tmp_versioned
GROUP BY _partition_id
) AS tmp
FULL OUTER JOIN (
SELECT _partition_id, count() AS count
FROM sessions_v2
GROUP BY _partition_id
) AS main
ON (tmp._partition_id == main._partition_id)
ORDER BY main._partition_id
```

* Add an early exit to migration

* cluster? extract common code

2024-02-22 09:54:39 +02:00

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SELECT 1 FROM system.replicas WHERE table = 'sessions_v2'