nextcloud / nextcloud/server

[Bug]: Migration to Postgresql 15 fails

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#36,789 4 comments 0 reactions 0 assignees View on GitHub

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2. developing 25-feedback bug feature: database feature: occ needs review
Dominant language
PHP
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Description

⚠️ This issue respects the following points: ⚠️
  • This is a bug, not a question or a configuration/webserver/proxy issue.
  • This issue is not already reported on Github (I've searched it).
  • Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
  • Nextcloud Server is running on 64bit capable CPU, PHP and OS.
  • I agree to follow Nextcloud's Code of Conduct.
Bug description

The migration from MariaDB to Postgresql 15 fails.
resynchronizeDatabaseSequences function fails with an error nextcloud.xxx_id_seq', (SELECT MAX() FROM ))

Steps to reproduce
  1. Get nextcloud on MariaDB
  2. Install Postgresql 15 with user nextcloud and schema nextcloud
  3. Launch the migration with occ db:convert-type
  4. The migration fails during the resynchronization of the database sequences
Expected behavior

The migration should end without any problem and the database configuration of Nextcloud should point to the new Postgres database.

Installation method

Other Community project

Operating system

None

PHP engine version

None

Web server

None

Database engine version

PostgreSQL

Is this bug present after an update or on a fresh install?

None

Are you using the Nextcloud Server Encryption module?

None

What user-backends are you using?
  • Default user-backend (database)
  • LDAP/ Active Directory
  • SSO - SAML
  • Other
Configuration report

No response

List of activated Apps
- activity: 2.17.0
  - circles: 25.0.0
  - cloud_federation_api: 1.8.0
  - comments: 1.15.0
  - dashboard: 7.5.0
  - dav: 1.24.0
  - federatedfilesharing: 1.15.0
  - federation: 1.15.0
  - files: 1.20.1
  - files_pdfviewer: 2.6.0
  - files_rightclick: 1.4.0
  - files_sharing: 1.17.0
  - files_trashbin: 1.15.0
  - files_versions: 1.18.0
  - firstrunwizard: 2.14.0
  - logreader: 2.10.0
  - lookup_server_connector: 1.13.0
  - nextcloud_announcements: 1.14.0
  - notifications: 2.13.1
  - oauth2: 1.13.0
  - password_policy: 1.15.0
  - photos: 2.0.1
  - privacy: 1.9.0
  - provisioning_api: 1.15.0
  - recommendations: 1.4.0
  - related_resources: 1.0.3
  - serverinfo: 1.15.0
  - settings: 1.7.0
  - sharebymail: 1.15.0
  - support: 1.8.0
  - systemtags: 1.15.0
  - text: 3.6.0
  - theming: 2.0.1
  - twofactor_backupcodes: 1.14.0
  - updatenotification: 1.15.0
  - user_status: 1.5.0
  - viewer: 1.9.0
  - weather_status: 1.5.0
  - workflowengine: 2.7.0
Nextcloud Signing status

No response

Nextcloud Logs

No response

Additional info

No response

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

The entry point is occ db:convert-type; reproduce the MariaDB-to-PostgreSQL 15 migration and inspect resynchronizeDatabaseSequences, where the reported sequence error occurs. Done means the migration completes and Nextcloud points to the new PostgreSQL database.

Written by the indexing model from the issue text.

Assessment

Tech stack
mariadb, php, postgresql
Domain
backend, databases
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
45/100

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