Re: Question on PostgreSQL DB behavior w.r.t JOIN and sort order.

My concern here is that I want to maintain consistency ( in our application to retain sort order) between different databases.
I don't see the issue in SQL Server and Oracle databases.
"SELECT KH_.r_object_id, KH_.object_name FROM dbo.dm_location_s AS ZS_ INNER JOIN
dbo.dm_sysobject_s AS KH_ ON ZS_.r_object_id = KH_.r_object_id "

The above query is sorted based on the first column in the select list. Same is not happening in PostgreSQL.
Is this something to do with collation setting in database?

-----Original Message-----
From: Adrian Klaver [mailto:adrian(dot)klaver(at)aklaver(dot)com]
Sent: Tuesday, February 09, 2016 11:32 AM
To: Venkatesan, Sekhar; David G. Johnston
Cc: Tom Lane; pgsql-sql(at)postgresql(dot)org
Subject: Re: [SQL] Question on PostgreSQL DB behavior w.r.t JOIN and sort order.

On 02/08/2016 09:53 PM, Venkatesan, Sekhar wrote:
> Yes. is there an option/configuration to tell the postgres
> optimizer/planner to generate plans to include the sort order instead
> of speed?

What columns in a table would that be and then what order?

>
> *From:*David G. Johnston [mailto:david(dot)g(dot)johnston(at)gmail(dot)com]
> *Sent:* Tuesday, February 09, 2016 11:20 AM
> *To:* Venkatesan, Sekhar
> *Cc:* Tom Lane; pgsql-sql(at)postgresql(dot)org
> *Subject:* Re: [SQL] Question on PostgreSQL DB behavior w.r.t JOIN and
> sort order.
>
> On Monday, February 8, 2016, Venkatesan, Sekhar
> <sekhar(dot)venkatesan(at)emc(dot)com <mailto:sekhar(dot)venkatesan(at)emc(dot)com>> wrote:
>
> Is there a way to tell the optimizer to retain the sort order if that
> is possible please?
>
> You mean, besides the ORDER BY clause?
>
> David J.
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com