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

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 15:01:39
Message-ID: CACjxUsOiFvDxOWi9=3v9-z8YgNN4a5GisDFraKhH0cH1Sn1YBw@mail.gmail.com
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On Fri, Sep 2, 2016 at 9:51 AM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)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). If
someone reported that as a bug, what would we tell them?

--
Kevin Grittner
EDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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