Where can I find information on how to migrate from MySQL
5.7 to MySQL 8.0?
For detailed upgrade information, see
Section 2.11, “Upgrading MySQL”. Do not skip a major version when
upgrading, but rather complete the process in steps, upgrading
from one major version to the next in each step. This may seem
more complicated, but it will you save time and trouble. If you
encounter problems during the upgrade, their origin will be
easier to identify, either by you or, if you have a MySQL
Enterprise subscription, by MySQL support.
A.8.2.
How has storage engine (table type) support changed in MySQL
8.0 from previous versions?
Storage engine support has changed as follows:
Support for ISAM tables was removed in
MySQL 5.0 and you should now use the
MyISAM storage engine in place of
ISAM. To convert a table
tblname from
ISAM to MyISAM,
simply issue a statement such as this one:
Internal RAID for
MyISAM tables was also removed in MySQL
5.0. This was formerly used to allow large tables in file
systems that did not support file sizes greater than 2GB.
All modern file systems allow for larger tables; in
addition, there are now other solutions such as
MERGE tables and views.
The VARCHAR column type now
retains trailing spaces in all storage engines.
MEMORY tables (formerly known as
HEAP tables) can also contain
VARCHAR columns.
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