Re: proposal: multiple psql option -c

On 07/28/2015 12:08 AM, Pavel Stehule wrote:

2015-07-28 5:24 GMT+02:00 Pavel Stehule <pavel.stehule@gmail.com <mailto:pavel.stehule@gmail.com>>:



    2015-07-27 21:57 GMT+02:00 Andrew Dunstan <andrew@dunslane.net
    <mailto:andrew@dunslane.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?

The SQL is without problem, but what about \x command?

postgres=# \dt \dn select 10;
No relations found.
List of schemas
┌──────┬───────┐
│ Name │ Owner │
╞══════╪═══════╡
└──────┴───────┘
(0 rows)

\dn: extra argument "10;" ignored

I don't understand the question.

You should include one sql or psql command per -C option, ISTM. e.g.

    psql -C '\dt' -C '\dn' -C 'select 10;'


Isn't that what we're talking about with this whole proposal?

cheers

andrew