On Tue, Jul 10, 2001 at 07:36:25PM -0400, Wyly Wade wrote:
>
> Never Index on text, blob, and if you can help it don't use var char
> in indexes.
There's nothing wrong with indexing a text or blob field. In fact,
it's often very useful to index just a small prefix (maybe 20
characters). It gives you a performance boost on some queries without
the overhead of building a massive index structure.
And varchar indexes are actually pretty cheap.
> Also it is always best to create all the all the indexes that you
> think you might need on a table before you put the data in. It only
> takes a few seconds to drop an index if you realize you do not need
> it afterward.
I don't think that advice scales well at all. But if scaling isn't
important in this case, it's a reasonable approach.
Jeremy
--
Jeremy D. Zawodny, <[EMAIL PROTECTED]>
Technical Yahoo - Yahoo Finance
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