| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Robert Haas <robertmhaas(at)gmail(dot)com>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Catalin Iacob <iacobcatalin(at)gmail(dot)com>, "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Adam Brightwell <adam(dot)brightwell(at)crunchydatasolutions(dot)com>, "Joshua D(dot) Drake" <jd(at)commandprompt(dot)com>, dinesh kumar <dineshkumar02(at)gmail(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: proposal: multiple psql option -c |
| Date: | 2015-11-17 19:34:03 |
| Message-ID: | CAFj8pRAg9gAuo-ADifFS4VGjMafovZnoui359pbe7ojjftLruQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
> Well, it's not *entirely* true that it has only backwards compatibility
> to recommend it: without -c in its current form, there would be no way
> to test multiple-commands-in-one-PQexec cases without hacking up some
> custom test infrastructure. That's not a very strong reason maybe, but
> it's a reason. And backwards compatibility is usually a strong argument
> around here anyway.
>
> I've not been following this thread in any detail, but have we considered
> the approach of allowing multiple -c and saying that each -c is a separate
> PQexec (or backslash command)? So the semantics of one -c wouldn't change,
> but commands submitted through multiple -c switches would behave
> relatively unsurprisingly, and we wouldn't need two kinds of switch.
>
I believe it can work, but there are stronger limit of single PQexec call -
only result of last command is displayed.
Regards
Pavel
>
> Another issue here is how -1 ought to interact with multiple -c.
>
> regards, tom lane
>
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