February 2018
Intermediate to advanced
510 pages
16h 10m
English
Content preview from MySQL 8 Administrator???s Guide
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mysql_upgrade - checking and upgrading MySQL tables
As the name suggests, this is used for upgrade operations. It checks for any incompatibility and makes repairs if it is necessary and also updates the grant tables with any changes in new versions of MySQL. It also updates the system tables so you can take advantage of any new privilege or compatibility that might have been added in the newer version.
Before performing an upgrade always backup your current MySQL installation.
If mysql_upgrade finds that a table has possible incompatibility, it performs a table check and attempts repairing the table, and if it cannot repair it, it will ask for a manual table repair.
mysql_upgrade should be executed each time MySQL is upgraded. It communicates ...
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