Re: proposal: multiple psql option -c

On 07/28/2015 04:43 AM, Marc Mamin wrote:
>
> >
> >
> >2015-07-28 5:24 GMT+02:00 Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>:
> >
> > 2015-07-27 21:57 GMT+02:00 Andrew Dunstan <andrew(at)dunslane(dot)net>:
> >
> > On 07/27/2015 02:53 PM, Pavel Stehule wrote:
> >
> > I am trying to run parallel execution
> >
> > psql -At -c "select datname from pg_database" postgres |
> xargs -n 1 -P 3 psql -c "select current_database()"
> >
> >
> >
> > I don't think it's going to be a hugely important feature,
> but I don't see a problem with creating a new option (-C seems fine)
> which would have the same effect as if the arguments were contatenated
> into a file which is then used with -f. IIRC -c has some special
> characteristics which means it's probably best not to try to extend it
> for this feature.
> >
> >
> > ok, I'll try to write patch.
> >
> >
> >I have a question. Can be -C option multiple?
>
>
> hello,
> Have you thought of how to support -1 along with -C ?
>
> > handle the input as with -f
> that is, -1 -C would be equivalent to -c
>
> and
> psql -1 -C "sql_1; sql_2;" -C "sql_3; sql_4;"
>
> => ?
>
> BEGIN;
> sql_1;
> sql_2;
> END;
>
> BEGIN;
> sql_3;
> sql_4;
> END;
>
> thoughts ?
>
> The same logic could be added to -f
> although I see less advantages as with adding -C
>
> psql -1 -f "file1, file2" -f "file3, file4"
>

This is way too complex and baroque. -1 should be global. Multiple -C
options should be concatenated. -f should not be touched.

cheers

andrew