Im trying to set up a primary key of server(text), date (date), hour (small int) but when i try to include the server field in the key it replies with

ALTER TABLE `exim` DROP PRIMARY KEY ,
ADD PRIMARY KEY ( `date` , `hour` , `server` )

#1170 - BLOB/TEXT column 'server' used in key specification without a key length

i have googled, but not much is relevant to my example i dont think..


CREATE TABLE `exim` (
  `date` date NOT NULL default '0000-00-00',
  `server` longtext NOT NULL,
  `hour` tinyint(4) NOT NULL default '0',
  `count` smallint(6) NOT NULL default '0',
  PRIMARY KEY  (`date`,`hour`),
) ENGINE=MyISAM DEFAULT CHARSET=latin1 COMMENT='exim realtime stats';

thanks
Ronan
--
Ronan McGlue
Analyst / Programmer
CMC Systems Group

Queens University Belfast

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