----- Original Message ----- > From: "Shawn Green" <shawn.l.gr...@oracle.com> > Subject: Re: Query optimizer-miss with unqualified expressions, bug or > feature? > > On a more serious note, indexes with limited cardinality are less useful > than those with excellent cardinality. Cardinality is an approximation > (or calculation. It depends on your storage engine) of how many unique > values there are in the index.
On a related note, are there any plans (and could you offer a rough timeframe?) to include bitmap indices in MySQL? Thanks, Johan -- Unhappiness is discouraged and will be corrected with kitten pictures. -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/mysql
