Re: Identifying indexes

The only indexes that enforce a constaint are primary key and unique key indexes. You can easily spot them using

SELECT INDEX_NAME, OWNER
FROM DBA_INDEXES
WHERE UNIQUENESS = 'NONUNIQUE' However, beware, there may be some unique indexes that may have been created for performance reasons only, even though a secondary intent may be to enforce a unique constraint. For instance Social Security Numbers are probably unique, guranteed pretty much by the application but an index defined on them will be defined as unique as unique indexes perform better. Therefore the intent here was not to enforce the constraint but rather to design a better index.

HTH Arup Nanda
www.proligence.com
----- Original Message -----
To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Friday, November 22, 2002 1:39 PM

> I am trying to find out what indexes are in the database only for
performance
> reasons and do not enforce a constraint. What would be the query to do
that?
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Arup Nanda
  INET: arupnanda_at_hotmail.com

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