Database broken, no tables but files are there?

MariaDB [(none)]> use nextcloud
Database changed
MariaDB [nextcloud]> show tables;
Empty set (0.00 sec)

This is a few days after applying https://docs.nextcloud.com/server/11/admin_manual/maintenance/mysql_4byte_support.html

File are there but they are not loaded?

[quote]/nextcloud_db/nextcloud# ls -allh
total 92789
drwx------ 2 88 88 127B May 29 14:45 ./
drwxr-xr-x 5 88 88 14B May 29 14:39 …/
-rw-rw---- 1 88 88 65B Feb 15 14:43 db.opt
-rw-rw---- 1 88 88 1.2K May 29 14:43 oc_accounts.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_accounts.ibd
-rw-rw---- 1 88 88 40K May 29 14:43 oc_activity.frm
-rw-rw---- 1 88 88 5.0M May 29 14:44 oc_activity.ibd
-rw-rw---- 1 88 88 21K May 29 14:43 oc_activity_mq.frm
-rw-rw---- 1 88 88 72K May 29 14:44 oc_activity_mq.ibd
-rw-rw---- 1 88 88 2.5K May 29 14:43 oc_addressbookchanges.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_addressbookchanges.ibd
-rw-rw---- 1 88 88 5.5K May 29 14:43 oc_addressbooks.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_addressbooks.ibd
-rw-rw---- 1 88 88 2.7K May 29 14:43 oc_admin_sections.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_admin_sections.ibd
-rw-rw---- 1 88 88 3.2K May 29 14:43 oc_admin_settings.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_admin_settings.ibd
-rw-rw---- 1 88 88 2.3K May 29 14:43 oc_appconfig.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_appconfig.ibd
-rw-rw---- 1 88 88 3.4K May 29 14:43 oc_authtoken.frm
-rw-rw---- 1 88 88 64K May 29 14:48 oc_authtoken.ibd
-rw-rw---- 1 88 88 5.2K May 29 14:43 oc_bruteforce_attempts.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_bruteforce_attempts.ibd
-rw-rw---- 1 88 88 2.5K May 29 14:43 oc_calendarchanges.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_calendarchanges.ibd
-rw-rw---- 1 88 88 3.9K May 29 14:43 oc_calendarobjects.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_calendarobjects.ibd
-rw-rw---- 1 88 88 4.0K May 29 14:43 oc_calendarobjects_props.frm
-rw-rw---- 1 88 88 72K May 29 14:44 oc_calendarobjects_props.ibd
-rw-rw---- 1 88 88 6.9K May 29 14:43 oc_calendars.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_calendars.ibd
-rw-rw---- 1 88 88 6.1K May 29 14:43 oc_calendarsubscriptions.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_calendarsubscriptions.ibd
-rw-rw---- 1 88 88 2.2K May 29 14:43 oc_cards.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_cards.ibd
-rw-rw---- 1 88 88 3.7K May 29 14:43 oc_cards_properties.frm
-rw-rw---- 1 88 88 72K May 29 14:44 oc_cards_properties.ibd
-rw-rw---- 1 88 88 4.4K May 29 14:43 oc_comments.frm
-rw-rw---- 1 88 88 80K May 29 14:44 oc_comments.ibd
-rw-rw---- 1 88 88 2.2K May 29 14:43 oc_comments_read_markers.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_comments_read_markers.ibd
-rw-rw---- 1 88 88 1.9K May 29 14:43 oc_credentials.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_credentials.ibd
-rw-rw---- 1 88 88 4.5K May 29 14:43 oc_dav_shares.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_dav_shares.ibd
-rw-rw---- 1 88 88 2.7K May 29 14:43 oc_external_applicable.frm
-rw-rw---- 1 88 88 72K May 29 14:44 oc_external_applicable.ibd
-rw-rw---- 1 88 88 18K May 29 14:43 oc_external_config.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_external_config.ibd
-rw-rw---- 1 88 88 2.1K May 29 14:43 oc_external_mounts.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_external_mounts.ibd
-rw-rw---- 1 88 88 3.2K May 29 14:43 oc_external_options.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_external_options.ibd
-rw-rw---- 1 88 88 988B May 29 14:45 oc_federated_reshares.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_federated_reshares.ibd
-rw-rw---- 1 88 88 2.2K May 29 14:43 oc_file_locks.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_file_locks.ibd
-rw-rw---- 1 88 88 22K May 29 14:44 oc_filecache.frm
-rw-rw---- 1 88 88 30M May 29 14:46 oc_filecache.ibd
-rw-rw---- 1 88 88 6.8K May 29 14:44 oc_files_trash.frm
-rw-rw---- 1 88 88 88K May 29 14:44 oc_files_trash.ibd
-rw-rw---- 1 88 88 2.7K May 29 14:44 oc_flow_checks.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_flow_checks.ibd
-rw-rw---- 1 88 88 3.0K May 29 14:44 oc_flow_operations.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_flow_operations.ibd
-rw-rw---- 1 88 88 1.9K May 29 14:44 oc_group_admin.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_group_admin.ibd
-rw-rw---- 1 88 88 1.9K May 29 14:44 oc_group_user.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_group_user.ibd
-rw-rw---- 1 88 88 1.1K May 29 14:44 oc_groups.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_groups.ibd
-rw-rw---- 1 88 88 18K May 29 14:44 oc_jobs.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_jobs.ibd
-rw-rw---- 1 88 88 2.4K May 29 14:44 oc_mimetypes.frm
-rw-rw---- 1 88 88 64K May 29 14:44 oc_mimetypes.ibd
-rw-rw---- 1 88 88 19K May 29 14:44 oc_mounts.frm
-rw-rw---- 1 88 88 88K May 29 14:48 oc_mounts.ibd
-rw-rw---- 1 88 88 4.0K May 29 14:44 oc_news_feeds.frm
-rw-rw---- 1 88 88 80K May 29 14:44 oc_news_feeds.ibd
-rw-rw---- 1 88 88 3.2K May 29 14:44 oc_news_folders.frm
-rw-rw---- 1 88 88 72K May 29 14:44 oc_news_folders.ibd
-rw-rw---- 1 88 88 3.8K May 29 14:45 oc_news_items.frm
-rw-rw---- 1 88 88 76M May 29 14:45 oc_news_items.ibd
-rw-rw---- 1 88 88 36K May 29 14:45 oc_notifications.frm
-rw-rw---- 1 88 88 80K May 29 14:45 oc_notifications.ibd
-rw-rw---- 1 88 88 5.8K May 29 14:45 oc_notifications_pushtokens.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_notifications_pushtokens.ibd
-rw-rw---- 1 88 88 5.5K May 29 14:45 oc_oauth2_access_tokens.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_oauth2_access_tokens.ibd
-rw-rw---- 1 88 88 10K May 29 14:45 oc_oauth2_clients.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_oauth2_clients.ibd
-rw-rw---- 1 88 88 1.6K May 29 14:45 oc_preferences.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_preferences.ibd
-rw-rw---- 1 88 88 4.2K May 29 14:45 oc_privatedata.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_privatedata.ibd
-rw-rw---- 1 88 88 3.7K May 29 14:45 oc_properties.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_properties.ibd
-rw-rw---- 1 88 88 3.2K May 29 14:45 oc_schedulingobjects.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_schedulingobjects.ibd
-rw-rw---- 1 88 88 10K May 29 14:45 oc_share.frm
-rw-rw---- 1 88 88 72K May 29 14:45 oc_share.ibd
-rw-rw---- 1 88 88 21K May 29 14:45 oc_share_external.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_share_external.ibd
-rw-rw---- 1 88 88 4.0K May 29 14:45 oc_spreedme_messages.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_spreedme_messages.ibd
-rw-rw---- 1 88 88 2.5K May 29 14:45 oc_spreedme_room_participants.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_spreedme_room_participants.ibd
-rw-rw---- 1 88 88 2.6K May 29 14:45 oc_spreedme_rooms.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_spreedme_rooms.ibd
-rw-rw---- 1 88 88 1.7K May 29 14:45 oc_storages.frm
-rw-rw---- 1 88 88 64K May 29 14:47 oc_storages.ibd
-rw-rw---- 1 88 88 1.7K May 29 14:45 oc_systemtag.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_systemtag.ibd
-rw-rw---- 1 88 88 1.9K May 29 14:45 oc_systemtag_group.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_systemtag_group.ibd
-rw-rw---- 1 88 88 1.5K May 29 14:45 oc_systemtag_object_mapping.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_systemtag_object_mapping.ibd
-rw-rw---- 1 88 88 8.2K May 29 14:45 oc_trusted_servers.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_trusted_servers.ibd
-rw-rw---- 1 88 88 2.0K May 29 14:45 oc_twofactor_backupcodes.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_twofactor_backupcodes.ibd
-rw-rw---- 1 88 88 2.5K May 29 14:45 oc_users.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_users.ibd
-rw-rw---- 1 88 88 3.9K May 29 14:45 oc_vcategory.frm
-rw-rw---- 1 88 88 72K May 29 14:45 oc_vcategory.ibd
-rw-rw---- 1 88 88 1.7K May 29 14:45 oc_vcategory_to_object.frm
-rw-rw---- 1 88 88 64K May 29 14:45 oc_vcategory_to_object.ibd
[/quote]

“This feature is currently experimental.” for MySQL and “This is even more experimental.” for MariaDB… says everything to me…