Re: Materialized view and index

Chuan,

You can crteate indexes on MVs if you want to - there is nothing against it; in fact it may be specifically desirable to do so. MVs are designed to help in query optimization by selecting against a "materialized" collection f data as opposed to selecting from a set of tables as in case of normal views and hence you can create as many indexes as you like to improve access plan.

The only downside I can think of, and it is pretty minimal, is increased time spent on index maintenance - be it in a fast refresh or complete one. But the cost is marginal compared to the benefit.

HTH. Arup Nanda

• Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: Monday, October 27, 2003 10:29 PM

> Hi, All
>
> Wondering whether anyone created indexes on materialized view to further
> improve the performance? What's the pros and cons of this method?
>
> Thanks in advance.
>
> Chuan
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Author: Arup Nanda
  INET: orarup_at_hotmail.com

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