Re: Index advisor advising index on primary key

Jeff

AFAIK, a primary key IS a unique index - it is still and index under the covers, although it might not get listed in very obvious ways. You CAN see the object size of the table be bigger when you have one, however.

Vern

-------------- Original message --------------
From: Jeff Crosby <jlcrosby@xxxxxxxxxxxxxxxx>

Oooh. So if I did an ALTER TABLE and added a UNIQUE constraint on this
file, that might do it?

Mark S. Waterbury wrote:

Hi, Jeff:

You said "primary key" but did not indicate whether this column has a
"unique" constraint?

(I know that when you add a unique constraint to a table or file it
creates an index (access path) under the covers.)

Mark

Jeff Crosby wrote:

...(snip)...
On our item master file, it is advising that I create an index on field
ITNBR. This file is an SQL table created via DDL (not DDS) and ITNBR is
the primary key. Does this advice make sense? Why would it advise an
index on the primary key?

--
Jeff Crosby
UniPro Foodservice/Dilgard
260-422-7531
Opinions expressed are my own and not necessarily those of my company. Unless I
say so.


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