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Merge pull request #911 from nextcloud/bugfix/noid/mysql-4byte-instructions-for-mysql8-and-later

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blizzz
2018-10-24 11:57:55 +02:00
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parent 1a907c9d8b cccd8533e4
commit 8bf200cd9f
1 changed files with 3 additions and 3 deletions
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admin_manual/configuration_database/mysql_4byte_support.rst
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@@ -65,17 +65,17 @@ MariaDB 10.2 or earlier
If the file format is "Barracuda" for every single table, nothing special is left to do. Continue with the MySQL instructions at step 3. While testing, all tables' file format was "Antelope".
3. The tables needs to be migrated to "Barracuda" manually, one by one. SQL commands can be created easily, however::
4. The tables needs to be migrated to "Barracuda" manually, one by one. SQL commands can be created easily, however::
MariaDB> USE INFORMATION_SCHEMA;
MariaDB> SELECT CONCAT("ALTER TABLE `", TABLE_SCHEMA,"`.`", TABLE_NAME, "` ROW_FORMAT=DYNAMIC;") AS MySQLCMD FROM TABLES WHERE TABLE_SCHEMA = "nextcloud";
This will return an SQL command for each table in the nextcloud database. The rows can be quickly copied into a text editor, the "|"s replaced and the SQL commands copied back to the MariaDB shell. If no error appeared (in doubt check step 2) all is done and nothing is left to do here. It can be proceded with the MySQL steps.
4. It is possible, however, that some tables cannot be altered. The operations fails with: "ERROR 1478 (HY000): Table storage engine 'InnoDB' does not support the create option 'ROW_FORMAT'". In that case the failing tables have a SPACE value of 0 in step 2. It basically means that the table does not have an index file of its own, which is required for the Barracuda format. This can be solved with a slightly different SQL command::
5. It is possible, however, that some tables cannot be altered. The operations fails with: "ERROR 1478 (HY000): Table storage engine 'InnoDB' does not support the create option 'ROW_FORMAT'". In that case the failing tables have a SPACE value of 0 in step 2. It basically means that the table does not have an index file of its own, which is required for the Barracuda format. This can be solved with a slightly different SQL command::
MariaDB> ALTER TABLE `nextcloud`.`oc_tablename` ROW_FORMAT=DYNAMIC, ALGORITHM=COPY;
Replace oc_tablename with the failing table. If there are too many (did not happen here), SQL commands can be generated in a batch (task for the reader).
5. Now everything should be fine and the MySQL instructions can be followed from step 3 onwards
6. Now everything should be fine and the MySQL instructions can be followed from step 3 onwards