Re: Speed Difference

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#510

From: Craig Stuntz TeamB
Date: Mon, 05 Nov 2007 16:06

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asf wrote:

> The UNION should be faster because the OR clause in the first
> statement will prevent the use of an index on prefix.

	No, that's wrong. An index will be used if available. You can confirm
this by reading the PLAN.

-- 
Craig Stuntz [TeamB] � Vertex Systems Corp. � Columbus, OH
  Delphi/InterBase Weblog : http://blogs.teamb.com/craigstuntz
Borland newsgroup denizen Sergio Gonz�lez has a new CD of 
  Irish music out, and it's good: http://tinyurl.com/7hgfr

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From: "Craig Stuntz [TeamB]" <craig_stuntz@nospam.please [a.k.a. acm.org]>
Subject: Re: Speed Difference
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