RE: SQL Like vs. = sign

Hi Dan,

yes, there is a huge performance difference.

With LIKE the optimizer can't use any index, ==> sequential search.


Mit freundlichen Grüßen / Kind regards

i.A. Erich W. Schasse

WIEDEMANN GmbH & Co. KG
IT/ORG
Wiedemannstr.
31157 Sarstedt
Tel. 05066/997-190
Fax  05066/997-366
mailto:schasse@xxxxxxxxxxxx
www.wiedemann.de



-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx]On Behalf Of Dan Bale
Sent: Tuesday, October 05, 2004 4:46 PM
To: midrange-l@xxxxxxxxxxxx
Subject: SQL Like vs. = sign


I am setting up a dynamic SQL statement based on user input for data
selection.  They are able to select using wildcards, so I am using the LIKE
predicate to handle this.

My question is this:  When the user doesn't specify wildcards, and specifies
a "straight" value, is there any difference between using LIKE and an equal
sign?  I.e.:

CUSTNAME LIKE 'BALE, DAN'
CUSTNAME = 'BALE, DAN'

tia,
db

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