The following bug has been logged online:
Bug reference: 4030
Logged by: Dave Gurnell
Email address: [EMAIL PROTECTED]
PostgreSQL version: 8.2.5
Operating system: Mac OS X / Debian
Description: Inconsistency: ORDER BY clauses involving column aliases
Details:
Hi,
I've noticed a possible inconsistency in the way PostgreSQL 8.2.5 renders
ORDER BY clauses.
Here is an example:
Create a table:
create table numbers (a integer, b integer, c integer);
Run a query ordered on aliases of its columns:
select x.a as xa, x.b as xb, x.c as xc from numbers as x order by xa,
xb, xc;
xa | xb | xc
----+----+----
(0 rows)
Run a query ordered on an expression involving these aliases:
test=# select x.a as xa, x.b as xb, x.c as xc from numbers as x order by
(xa + xb + xc);
ERROR: column "xa" does not exist
LINE 1: ... x.b as xb, x.c as xc from numbers as x order by (xa + xb +
...
Is this expected behaviour or is it a bug?
Many thanks,
-- Dave
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