Questions
Questions and Answers
22.8.1: How has storage engine (table type) support changed in MySQL 5.1 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:
ALTER TABLE tblname
ENGINE=MYISAM;
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.
22.8.2: Where can I find information on how to migrate from MySQL 5.0 to MySQL 5.1?
For detailed upgrade information, see Section 2.12.1, “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.
User Comments
Add your own comment.