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Re: Query optimizer-miss with unqualified expressions, bug or feature?




----- Original Message -----
> From: "Shawn Green" <shawn.l.green@xxxxxxxxxx>
> 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

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