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Re: [GENERAL] interesting PHP/MySQL thread

From: nolan(at)celery(dot)tssi(dot)com
To: scrappy(at)postgresql(dot)org (The Hermit Hacker)
Cc: scrappy(at)postgresql(dot)org (The Hermit Hacker),JanWieck(at)Yahoo(dot)com (Jan Wieck),pgman(at)candle(dot)pha(dot)pa(dot)us (Bruce Momjian),josh(at)agliodbs(dot)com (Josh Berkus), mail(at)joeconway(dot)com (Joe Conway),pgsql-advocacy(at)postgresql(dot)org (\"\"\"Advocacy PostgreSQL\"\"\"),pgsql-general(at)postgresql(dot)org (PostgreSQL-general)
Subject: Re: [GENERAL] interesting PHP/MySQL thread
Date: 2003-06-23 05:33:51
Message-ID: 20030623053352.1457.qmail@celery.tssi.com (view raw or flat)
Thread:
Lists: pgsql-advocacypgsql-docspgsql-general
> > Personally, if I want case insensitivity, I'll WRITE IT INTO THE CODE,
> > but I can see how some people might think that 'NOLAN', 'Nolan' and
> > 'nolan' should be considered as the same data.
> 
> Oh, you mean like "SELECT * FROM table WHERE field ~* 'nolan';"?

No, I mean as in "SELECT * FROM table WHERE field = 'nolan';"

That will match values with any combination of upper and lower case
letters that fold to 'nolan':  'Nolan', 'NOLAN', etc. 

Also, unlike PostgreSQL (at least in 7.3), if you define an index on
the column, mysql appears to use it for LIKE queries.

   "SELECT * FROM table WHERE field LIKE 'nolan%';" 

is very fast in mysql but not in 7.3, and even non-anchored LIKE searches
in mysql appear to be using the index.
  
   "SELECT * FROM table WHERE field LIKE '%nolan%';" 

executes considerably faster with an index on field than without one.
--
Mike Nolan

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