Re: Encoded Vector Indexes

[JOberholtzer@xxxxxxxxxxxx]

Has anyone played with EVIs?  They look interesting and may be a good use
for web applications that can sort/select by many different fields or
anything using dynamic SQL.

Yes I have.  They work best when built over data that would have a natural
limit on the number of key entries in the table.  An example would be the
state field or county.  Social security number would be a very bad choice
because there is one per unique individual for instance.  Depending on the
size of the database I have used the first three characters of the zip code
in the past.  That way a location lookup can use the EVI to eliminate most
of the rows in query right away without even looking at the other indices.

Jim Oberholtzer
Senior Technical Solutions Consultant
Computech Resources, Inc.
Phone:  262/785-8111
Fax:      262/785-8107

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