Re: Implement targetlist SRFs using ROWS FROM() (was Changed SRF in targetlist handling)

On Fri, Sep 2, 2016 at 10:10 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Kevin Grittner <kgrittn@gmail.com> writes:
>> On Fri, Sep 2, 2016 at 9:51 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>>> regression=# select *, generate_series(1,3) from int8_tbl;
>
>> I'm sure that you realize that running a query of that form twice
>> against a table with more than one heap page could result in rows
>> in a different order, even if no changes had been made to the
>> database (including no vacuum activity, auto- or otherwise).
>
> You missed my point: they might complain about the generate_series
> output not being in the order they expect, independently of what
> the table rows are.

I didn't miss it, I just never thought that anyone would care about
a secondary sort key if the primary sort key was random.  I have
trouble imagining a use-case for that.

--
Kevin Grittner
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