From: Roberto Mello <rmello@cc.usu.edu>
To: George A.J <jinujosein@yahoo.com>
Cc: pgsql-sql@postgresql.org
Subject: Re: Case Insensitive comparison
Date: Wed, 24 Sep 2003 23:30:08 -0600
Message-ID: <20030925053008.GC4203@cc.usu.edu> (raw)
In-Reply-To: <20030925033550.35699.qmail@web14915.mail.yahoo.com>
References: <20030925033550.35699.qmail@web14915.mail.yahoo.com>
On Wed, Sep 24, 2003 at 08:35:50PM -0700, George A.J wrote:
> hai
>
> i am using postgresql 7.3.x. I am converting a database in MS SQL server to PostgreSQL.
>
> The main problems i am facing is that in sql server the text comparisons are case insensitive. how can i compare text case insensitive in postgresql without using an upper() or lower() function in both sides (=). Is there any option to set in postgresql?
> Is there any problem in overriding the = operator that compare text. ie droping the current operator = and creating a new = operator(text,text). Does the existing = operator is using internally by postgres for some porpose. please help
Souinds like MS-SQL has broken behavior.
Use ILIKE, but I can't remember if you lose indice seaches with that.
Overriding the operator should be ok, but again I don't know what the
impact on index usage would be.
> Another problem is in creating function...
> How can i create a function that accept and return any type. the type "any" is not allowing as parameter or return type. Is it possible? i want to create a function similar to NULLIF().
Use the standard coalesce().
-Roberto
--
+----| Roberto Mello - http://www.brasileiro.net/ |------+
+ Computer Science Graduate Student, Utah State University +
+ USU Free Software & GNU/Linux Club - http://fslc.usu.edu/ +
MONEY TALKS ... but all mine ever says is GOODBYE!
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To: pgsql-sql@postgresql.org
Cc: rmello@cc.usu.edu, jinujosein@yahoo.com
Subject: Re: Case Insensitive comparison
In-Reply-To: <20030925053008.GC4203@cc.usu.edu>
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