alter table ezsearch_return_count add key ( phrase_id, count );
alter table ezsearch_search_phrase add key ( phrase );

CREATE TABLE `ezsearch_search_phrase_new` (
  `id` int(11) NOT NULL auto_increment,
  `phrase` varchar(250) default NULL,
  `phrase_count` int(11) default '0',
  `result_count` int(11) default '0',
  PRIMARY KEY  (`id`),
  UNIQUE KEY ( `phrase` ),
  KEY ( `phrase_count` )
);

INSERT INTO ezsearch_search_phrase_new ( phrase, phrase_count, result_count )
SELECT   lower( phrase ), count(*), sum( ezsearch_return_count.count )
FROM     ezsearch_search_phrase,
         ezsearch_return_count
WHERE    ezsearch_search_phrase.id = ezsearch_return_count.phrase_id
GROUP BY lower( ezsearch_search_phrase.phrase );

-- ezsearch_return_count is of no (additional) use in a normal eZ publish installation
-- but perhaps someone built something for himself, then it is not BC
-- to not break BC apply the CREATE and INSERT statements

CREATE TABLE `ezsearch_return_count_new` (
  `id` int(11) NOT NULL auto_increment,
  `phrase_id` int(11) NOT NULL default '0',
  `time` int(11) NOT NULL default '0',
  `count` int(11) NOT NULL default '0',
  PRIMARY KEY  (`id`),
  KEY ( `phrase_id`, `count` )
);

INSERT INTO `ezsearch_return_count_new` ( phrase_id, time, `count` )
SELECT    ezsearch_search_phrase_new.id, time, `count`
FROM      ezsearch_search_phrase,
          ezsearch_search_phrase_new,
          ezsearch_return_count
WHERE     ezsearch_search_phrase_new.phrase = LOWER( ezsearch_search_phrase.phrase ) AND
          ezsearch_search_phrase.id = ezsearch_return_count.phrase_id;

-- final tasks with and without BC
DROP TABLE ezsearch_search_phrase;
ALTER TABLE ezsearch_search_phrase_new RENAME TO ezsearch_search_phrase;

DROP TABLE `ezsearch_return_count`;
-- of course the next statement is only valid if you created `ezsearch_return_count_new`
ALTER TABLE ezsearch_return_count_new RENAME TO ezsearch_return_count;