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RE: Long-running SQL

From: Freeman, Robert <Robert_Freeman_at_csx.com>
Date: Wed, 27 Mar 2002 11:38:32 -0800
Message-ID: <F001.00435284.20020327113832@fatcity.com>


Yep, Guy's book is among my fav's. I consider it an indispensable DBA book.

RF

Robert G. Freeman - Oracle8i OCP
Oracle DBA Technical Lead
CSX Midtier Database Administration

The Cigarette Smoking Man: Anyone who can appease a man's conscience can take his freedom away from him.

-----Original Message-----
Sent: Wednesday, March 27, 2002 2:26 PM
To: 'ORACLE-L_at_fatcity.com'; Freeman, Robert

Thanks for clarifying, Mr. Cigarette Smoking Man. I loaned my book to someone (again). I find a lot of people could benefit from spending a week or so with that book. Whether or not they read it isn't my problem.

Lisa

> -----Original Message-----
> From: Freeman, Robert [SMTP:Robert_Freeman_at_csx.com]
> Sent: Wednesday, March 27, 2002 1:54 PM
> To: Multiple recipients of list ORACLE-L
> Subject: RE: Long-running SQL
>
> <<It is using the index. Range scans are not "smart" so to speak. In
> Harrison's sql tuning book, he states that a range scan is not
> intelligent.>>
>
> Well, depends on the type of range scan. There are two kinds, bonded and
> unbounded. Bounded is indeed intelligent and starts and stops at specific
> points. This kind of range scan you will find, for example, when the WHEN
> clause contains something like:
>
> where range_id > 100 and range_id < 300
>
> An unbounded range scan, starts at a specific place in the index and reads
> basically the remainder of the index. A bounded range scan is caused by
> such actions like
>
> Where range_id > 100
>
> RF
>
> Robert G. Freeman - Oracle8i OCP
> Oracle DBA Technical Lead
> CSX Midtier Database Administration
>
> The Cigarette Smoking Man: Anyone who can appease a man's conscience can
> take his freedom away from him.
>
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Freeman, Robert
> INET: Robert_Freeman_at_csx.com
>
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Freeman, Robert 
  INET: Robert_Freeman_at_csx.com

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Received on Wed Mar 27 2002 - 13:38:32 CST

Original text of this message

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