Re: ordering of selected rows from an ordered subselect - Mailing list pgsql-sql

From Andrew Sullivan
Subject Re: ordering of selected rows from an ordered subselect
Date
Msg-id 20070217152434.GA3623@phlogiston.dyndns.org
Whole thread Raw
In response to ordering of selected rows from an ordered subselect  ("Rajesh Kumar Mallah" <mallah.rajesh@gmail.com>)
List pgsql-sql
On Sat, Feb 17, 2007 at 03:02:06PM +0530, Rajesh Kumar Mallah wrote:
> 
> select   id , name , expensive_func(name)  from
>        ( select id , name from tab  order by c1 desc limit 15)  as foo ;
> 
> is it guaranteed that the final result is order by c1 ?

No, because expensive_func(name) might do something that alters it,
no?  All things considered, it's a pretty good _bet_ it will be
ordered as you wish, though.

A

-- 
Andrew Sullivan  | ajs@crankycanuck.ca
The whole tendency of modern prose is away from concreteness.    --George Orwell


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