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Re: Database, Table Names are resulting in lowercase

From: Andrew Biagioni <andrew(dot)biagioni(at)e-greek(dot)net>
To: Hemapriya <priyam_1121(at)yahoo(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Database, Table Names are resulting in lowercase
Date: 2004-06-24 14:50:25
Message-ID: 40DAEA31.1090508@e-greek.net (view raw or flat)
Thread:
Lists: pgsql-admin
If you specify an object's name without quoting it, e.g.:

    ALTER TABLE MyTable ADD COLUMN MyNewCol INT4;

then it is read as all lower case.  This means, that table "mytable" 
will be altered, and the new column will be called "mynewcol".

To force mixed or upper case, you quote the names, e.g.:

    ALTER TABLE "MyTable" ADD COLUMN "MyNewCol" INT4;

This will alter only a table called "MyTable", and table "mytable" will 
not be altered.  The new column will be called "MyNewCol".

IMHO, this system allows you to have mixed/upper case if you need it, 
but keeps things simpler if you don't need it by avoiding case-sensitive 
confusion.  You can keep your SQL code more readable by adopting 
case-specific name conventions (in the above examples, the SQL keywords 
are all in upper case and the names all mixed or lower case), without 
worrying about the objects getting created in a jumble of different 
cases (if, e.g., a previous DBA used a different case convention from 
the new DBA).

In my experience the only use for true mixed-case names are when I 
import a table from another database, e.g. MS SQL Server or Access;  at 
that time it's essential to have the quoting mechanism to ALLOW me to 
specify a truly-mixed-case table or column name, since the import 
mechanisms tend to preserve the true name case which in MS are often 
mixed-case.

Hope this helps,

                             Andrew


Hemapriya wrote:

>Hi All,
>
>We have postgresql running in mac. I found whatever db
>objects i create from the sql prompt results
>in lowercase. Can anyone tell me why it is happening.?
>does postgres stores the db objects in lowercase
>internally..
>
>If i create something from the shell prompt it remains
>in the same case i used. Can anyone tell me what is
>the case limitations we have in postgres for
>db,table,column names,etc.
>
>Thanks
>Priya
>
>
>
>
>
>	
>		
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Subject: Re: Database, Table Names are resulting in lowercase
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