pager with mysql

Is there a way to use: http://pear.php.net/package/Pager/ to page the results of a MYSQL query? I prefer the features and the fact that this class is being actively developed but there's one thing I do not understand re: using it with MYSQL/PHP: on this page: http://pear.php.net/manual/en/package.html.pager.intro.php in example no. 1 we see the line: " 'itemData' =>array('a','b','c','d','e',[...omissis...],'z')" I don't understand. Most pager code I've seen (given a result set's parameters) will fetch only the part of the DB that needs to be displayed not the whole DB. But the line above from the PEAR pager doc. seems to indicate that the whole array ie. the whole entire result set is needed by the class. That's ok for the alphabet but not workable for a big result set when we really need a pager. I must not understand - could someone explain? Thanks, Lee G.