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Re: TR: interface PERL and return results

From: victor3(dot)lopes(at)voila(dot)fr <victor3(dot)lopes(at)voila(dot)fr>
To: nandrews <nandrews(at)investsystems(dot)co(dot)uk>
Cc: pgsql-interfaces <pgsql-interfaces(at)postgresql(dot)org>
Subject: Re: TR: interface PERL and return results
Date: 2002-10-09 11:38:40
Message-ID: H3PPOG$38402EE55612F9D40A91244C4A909459@voila.fr (view raw or flat)
Thread:
Lists: pgsql-interfaces
Bonjour (you speak french ? ;-) )

Thanks  for your response,
Indeed I confused two commands copy (libpq) and \copy (psql).

I have try two methods for charge my result.res in my table.

the first  method :

$res = $db->exec(" COPY temp FROM "full path\result.res ");

Unfortunately I did not succeed in using this method, I had always an
error ( While placing postgres in debug mode ).

DEBUG:  StartTransactionCommand
DEBUG:  query: COPY temp FROM '-- my path -- /result.res'
DEBUG:  parse tree: { QUERY :command 5  :utility ?  :resultRelation 0 :into <> :isPortal false :isBinary false :isTemp false :hasAggs false :hasSubLinks false :rtable <> :jointree <> :rowMarks () :targetList <> :groupClause <> :havingQual <> :distinctClause <> :sortClause <> :limitOffset <> :limitCount <> :setOperations <> :resultRelations ()}
DEBUG:  ProcessUtility: COPY temp FROM '-- my path -- /result.res'
ERROR:  You must have Postgres superuser privilege to do a COPY directly to or from a file.  Anyone can COPY to stdout or from stdin.  Psql's \copy command also works for anyone.
....

I don't understand why this error because the superuser postgres (who had create for launch the server) have the privilege
for access and read this file.

The second method :

$res = $db->exec('COPY temp FROM stdin');

open (FIC,'<result.res');
while (<FIC>) {
        $db->putline($_);
        }
$db->putline("\\.\n");
close(FIC);
print $res->resultStatus;

This method works with success, but i have some questions.

- print $res->resultStatus; print PGRES_COPY_IN
But i don't kown if  the action of copy achieve its goal or no. I post this question because i has tested this case
after insert an row error on file and the response had the same.

Documentation indicates that one would have to be inserted a command $res = $db->endcopy for synchronize the copy
instruction.  But  when i use this instruction at end of my code., the prog perl blocks itself  and if i kill, the operation of copy
fails on postgres.
If  i omit this instruction the process works fine.  Must I use or not this instruction ?


Victor


>
>
> Bonjour,
>
> On Mon, 7 Oct 2002, [utf-8] victor3(dot)lopes(at)voila(dot)fr wrote:
>
> > Hello no one has a solution for my problem :-) ?
> >
> >
> > ---------- EntĂȘte Initiale  -----------
> >
> > De    : "victor3(dot)lopes(at)voila(dot)fr" <victor3(dot)lopes(at)voila(dot)fr>
> > A     : "pgsql-interfaces" <pgsql-interfaces(at)postgresql(dot)org>
> > Copie :
> > Date  : Sat,  5 Oct 2002 23:31:40 +0200
> > Objet : interface PERL and return results
> >
> > Hello,
> > I use Perl Pg interface to join my postgresql database.
> >
> > I wan't  send the below query in perl :
> >
> > $res = $db->exec(' create table temp (....); \copy temp from result.res');
>
> The \copy is a psql command. You need to use just the word 'copy' without the
> leading '\'.
>
> Using:
>
>  COPY temp FROM /path/to/result.res
>
> will try and read result.res from a file on the server system. To load a file
> on your client system you should use COPY temp FROM STDIN and read the Pg
> manpage.
>
> Documentation:
>
> http://developer.postgresql.org/docs/postgres/sql-copy.html
>
> and
>
> man Pg
>
> search for 'copy' in the second of these to get a good starting point on the
> subject.
>
>
> --
> Nigel J. Andrews
> Director
>
> ---
> Logictree Systems Limited
> Computer Consultants
>
>
>
------------------------------------------

Faites un voeu et puis Voila ! www.voila.fr


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Subject: TR: Re: TR: interface PERL and return results
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Subject: Re: compile error

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