Oracle FAQ Your Portal to the Oracle Knowledge Grid
HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US
 

Home -> Community -> Mailing Lists -> Oracle-L -> Re: Qualifying columns to improve performance?

Re: Qualifying columns to improve performance?

From: Oliver Artelt <oli_at_md.transnet.de>
Date: Tue, 03 Apr 2001 09:25:41 -0700
Message-ID: <F001.002DFAD1.20010403083022@fatcity.com>

Hi,

you should better reuse your parsed statements

oli

Arn.Klammer_at_austrac.gov.au wrote

> > At a course some years ago, we were told that in join statements, we
should
> qualify ALL our column names with the appropriate table name, not just
> those that may be ambiguous. The reason was that the parser would not need
> to spend time checking multiple tables to determine the table to which each
> column belongs.
>
> Is this still a valid rule?
>
> Does this apply to statements in PL/SQL procedures/packages? Or are they
> different, because they are checked at compile time?
>
> -a
>
>
> **********************************************************************
> This email and any files transmitted with it are confidential and
> intended solely for the use of the individual or entity to whom they
> are addressed. If you have received this email in error please notify
> the system manager.
>
> This footnote also confirms that this email message has been swept by
> MIMEsweeper for the presence of computer viruses.
>
> www.mimesweeper.com
> **********************************************************************
>
>
> To: ORACLE-L_at_fatcity.com


Content-Type: application/octet-stream; charset="iso-8859-1"; name="TEXT.htm"
Content-Transfer-Encoding: base64
Content-Description: 
----------------------------------------

-- 
Oliver Artelt
Oracle Certified DBA

cubeoffice GmbH & Co.KG # jordanstrasse 7 # 39112 magdeburg
telefon: +49 (0)391 6 11 28 10 # telefax: +49 (0)391 6 11 28 19
email: info@cubeoffice.de # web: http://www.cubeoffice.de
-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.com
-- 
Author: Oliver Artelt
  INET: oli_at_md.transnet.de

Fat City Network Services    -- (858) 538-5051  FAX: (858) 538-5051
San Diego, California        -- Public Internet access / Mailing Lists
--------------------------------------------------------------------
To REMOVE yourself from this mailing list, send an E-Mail message
to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in
the message BODY, include a line containing: UNSUB ORACLE-L
(or the name of mailing list you want to be removed from).  You may
also send the HELP command for other information (like subscribing).
Received on Tue Apr 03 2001 - 11:25:41 CDT

Original text of this message

HOME | ASK QUESTION | ADD INFO | SEARCH | E-MAIL US