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Re: Case sensitive

From: John Verhoeven <johnv_at_acix.DIALix.oz.au>
Date: 1996/11/17
Message-ID: <johnv.0ae5@acix.DIALix.oz.au>#1/1

In article dated 14 Nov 1996 16:42:02 GMT, Jeff Murphy (jcmurphy_at_acsu.buffalo.edu) wrote:
> Antonio Melo (avm_at_novabase.pt) wrote:
> > 2. use " where upper(name) like 'MAR%' " => performance problems...
>
>
> what are the performance implications of using this technique to provide
> case insensitive searches?

Using certain SQL functions will cause a full table scan to be done instead of a index range scan & lookup by rowid.

-- 
 _--_|\  John Verhoeven           Unix / Database Administrator Westrail
/      \              johnv_at_DIALix.oz.au / jverhoeven_at_westrail.wa.gov.au
*_.--._/
      v   "Smile! things could be worse... So I did... and they were..."
Received on Sun Nov 17 1996 - 00:00:00 CST

Original text of this message

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