| From: | Kevin Grittner <kgrittn(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Andres Freund <andres(at)anarazel(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Implement targetlist SRFs using ROWS FROM() (was Changed SRF in targetlist handling) |
| Date: | 2016-09-02 16:04:20 |
| Message-ID: | CACjxUsP7v6fx4nn0sGkeWxMi3jUfQRSHj5yo4s64HXZ+NFa-KQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Fri, Sep 2, 2016 at 10:10 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> Also, before getting too high and mighty with users who expect
> "select * from table" to produce rows in a predictable order,
> you should reflect on the number of places in our regression
> tests that assume exactly that ...
An assumption that not infrequently breaks. AFAIK, we generally
adjust the tests when that happens, rather than considering it a
bug in the code. I never thought we did that because there was a
secret, undocumented guarantee of order, but to allow different
code paths to be tested than we would test if we always specified
an order.
--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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