analytics/attach-partition.sql.eex at 7efcd9621f12f2614a8beb8b0a001db26344256e - analytics - gitea: Gitea Service

plausible/analytics

mirror of https://github.com/plausible/analytics.git synced 2024-12-26 02:55:02 +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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Elixir

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ALTER TABLE sessions_v2_tmp_versioned ATTACH PARTITION '<%= @partition %>' FROM sessions_v2