Re: Question about SPI_prepare

On Tue, Nov 11, 2008 at 11:33:41AM -0600, Tim Keitt wrote:
> I have an application where I am building a plan with SPI_plan and
> then this plan is called multiple times. There is one free parameter
> ($1) to the plan. The issue is with the order of the values returned.
> If $1 is identical during successive calls to SPI_execute_plan, is
> there any guarantee that the rows will be returned in the same order?
> I know that repeated queries can return rows in different order, but
> am specifically wondering about a prepared plan. (I can imagine the
> plan somehow snap-shots the table when prepared such that rows always
> come back in the same order, but I'm guessing that is not the case.)
> If not, I simply have to add an order by clause which will incur some
> overhead.
>
> THK
>
> --
> Timothy H. Keitt
> http://www.keittlab.org/
>

Only ORDER BY will guarantee the order of results.

- Josh / eggyknap