Re: Case Insensitive searches
От
Richard Broersma
Тема
Re: Case Insensitive searches
Дата
Msg-id
396486430808040705m5002d334iaf08f8fee03c5107@mail.gmail.com
Ответ на
Case Insensitive searches (Mike Gould)
Список
Дерево обсуждения
Case Insensitive searches "Mike Gould" <mgould@allcoast.net>
Re: Case Insensitive searches "Richard Broersma" <richard.broersma@gmail.com>
Re: Case Insensitive searches Terry Lee Tucker <terry@chosen-ones.org>
Re: Case Insensitive searches Frank Bax <fbax@sympatico.ca>
Re: Case Insensitive searches Terry Lee Tucker <terry@chosen-ones.org>
Re: Case Insensitive searches "Rafael Domiciano" <rafael.domiciano@gmail.com>
Re: Case Insensitive searches Terry Lee Tucker <terry@chosen-ones.org>
On Mon, Aug 4, 2008 at 6:54 AM, Mike Gould wrote: >In some db's if you > use a lower() or upr() it will always do a table scan instead of using a > index True, this would also happen in PostgreSQL. However, you can overcome this by creating a "functional" index: http://www.postgresql.org/docs/8.3/interactive/indexes-expressional.html This way all expression using where lower( column ) = 'a'. will always use an index scan. -- Regards, Richard Broersma Jr. Visit the Los Angeles PostgreSQL Users Group (LAPUG) http://pugs.postgresql.org/lapug
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