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. +