February 2018
Intermediate to advanced
510 pages
16h 10m
English
Content preview from MySQL 8 Administrator???s Guide
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Logical downgrade
Take a dump of all the tables using mysqldump in the new version. Install the new version of MySQL 8 with the new database and load the old version dump into the new database. This downgrade is also supported within the same GA release series and for the release level. MySQL 8.0 to 5.7 downgrade is supported using the logical downgrade method.
To perform the logical downgrade, follow these steps:
- Take a dump of the database, using the following code:
mysqldump -u root -p --add-drop-table --routines --events --all-databases --force > data-for-downgrade.sql
- Shut down the MySQL server, as shown here:
mysqladmin -u root -p shutdown
- Initialize the new data directory to the older MySQL version, using the following code: ...
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