Thread:Project:Support desk/upgrade problems: 1.11 -- 1.21/reply (16)

No, you need to open a mysql command prompt and execute that statement on the database for the wiki.

Example:

user@host> mysql -u root -p   mysql> use wikidb; Database changed. mysql> ALTER TABLE /*$wgDBprefix*/revision > ADD rev_sha1 varbinary(32) NOT NULL default ;

If you're using phpMyAdmin you can also execute if from there.