Re: [HACKERS] One-shot expanded output in psql using \G

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От David G. Johnston
Тема Re: [HACKERS] One-shot expanded output in psql using \G
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Msg-id CAKFQuwbrrKkkyN=5MRVW_ydf9SF5aC2XAO-+0zeubkSiQPwc9w@mail.gmail.com
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Ответ на Re: [HACKERS] One-shot expanded output in psql using \G  (Stephen Frost <sfrost@snowman.net>)
Ответы Re: [HACKERS] One-shot expanded output in psql using \G  (Stephen Frost <sfrost@snowman.net>)
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On Mon, Jan 30, 2017 at 8:35 AM, Stephen Frost <sfrost@snowman.net> wrote:
Tom,

* Tom Lane (tgl@sss.pgh.pa.us) wrote:
> Stephen Frost <sfrost@snowman.net> writes:
> > This particular bike-shedding really doesn't seem to be terribly useful
> > or sensible, to me.  \gx isn't "consistent" or "descriptive", frankly.
>
> Why not?  To me it reads as "\g with an x option".  The "x" refers to
> the implied "\x", so it's not an arbitrary choice at all.

That's not how '\dx' works, as I pointed out, so I don't see having the
second character being 'x' to imply "\x mode" makes sense.

​It makes perfect sense ... it just not something that we've had the option to do before (no, I haven't tried to figure out if we've missed an opportunity or two here).​

​[...]​

without actual consistency across commands which take 'x'
as a sub-command I don't see the 'descriptive' argument as holding much
weight either
​.

​Arguing that something is mnemonic doesn't require any precedence - though one could wish for better uses of mnemonic naming choices for past and future items.

In scripting uses of psql I could see wanting to use "\gx" and, say "\gn" (i.e., always output in non-expanded mode) instead of ";" so that for any given query I can specify the exact layout I care about and don't have to jump through hoops to toggle \x back and forth.

Limiting consideration of the use-case of this feature to interactive use is, IMHO, a mistake.  In the copious use of psql scripting that I do I would find both options I named above to be useful to directly and concisely communicate the display intent of each query I execute.

David J.

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