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help / color / mirror / Atom feedFrom: Bruce Momjian <bruce@momjian.us>
To: Dev Kumkar <devdas.kumkar@gmail.com>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Alvaro Herrera <alvherre@2ndquadrant.com>
Cc: Thomas Kellerer <spam_eater@gmx.net>
Cc: pgsql-sql@postgresql.org
Subject: Re: Unquoted column names fold to lower case
Date: Wed, 3 Jul 2013 19:29:34 -0400
Message-ID: <20130703232934.GE6492@momjian.us> (raw)
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On Thu, Jul 4, 2013 at 02:00:24AM +0530, Dev Kumkar wrote:
> On Thu, Jul 4, 2013 at 1:36 AM, Bruce Momjian <bruce@momjian.us> wrote:
>
> And let's not forget that column aliases can be used as indentifiers in
> queries:
>
> test=> SELECT 1 AS x
> test-> ORDER BY x;
> x
> ---
> 1
> (1 row)
>
> test=> SELECT 1 AS "X"
> ORDER BY x;
> ERROR: column "x" does not exist
> LINE 2: ORDER BY x;
>
> Changing this would mean that the same identifier would have different
> case-folding rules depending on where it appeared in the query.
>
>
> Sorry but I am not sure about your point here. Currently if the alias is quoted
> then same needs to be used in queries as identifies:
> SELECT 1 AS "X"
> ORDER BY "X";
You would need to double-quote 'x' in the ORDER BY, but not in the
target list (because case would be preserved there) --- that is
confusing.
--
Bruce Momjian <bruce@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
--
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To: pgsql-sql@postgresql.org
Cc: bruce@momjian.us, devdas.kumkar@gmail.com, tgl@sss.pgh.pa.us, alvherre@2ndquadrant.com, spam_eater@gmx.net
Subject: Re: Unquoted column names fold to lower case
In-Reply-To: <20130703232934.GE6492@momjian.us>
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