slg_saravanan has asked for the wisdom of the Perl Monks concerning the following question:

Hi All,

When I try to connect more than one Database through my Perl code.It is giving the following error :

Software error: Can't connect to data source "dbi:Oracle:host=10.0.0.1;sid=dev;","queryeditor","editor", no database driver specified and DBI_DSN env var not set at /usr/local/apache/cgi-bin/saravanan/queryeditor_dev/dbnameselection.cgi line 47

Following is the part of script :

$ENV{ORACLE_HOME}="/home/oracle/product/10.2.0/db_1";
our $conn1 = DBI->connect("dbi:Oracle:host=10.0.0.1;sid=dev;","queryed
+itor","editor");
die($DBI::errstr) unless $conn1;

my $connection_detail = "select DBDESCRIPTION from qe_dbnamelist where
+ DBNAME='$dbname'";
my $connection_records = $conn1->prepare($connection_detail) or die("E
+rror on preparing the sql statement \n");
$connection_records->execute() or die("Error on getting the data from 
+QE_GROUP \n");
print "Query String Part";
@connection_resultset= $connection_records->fetchrow_array;

$dbconnectionstring = $connection_resultset[0];
print $dbconnectionstring;
our $conn2 = DBI->connect($dbconnectionstring);
die($DBI::errstr) unless $conn2;
print "$dbname Database Successfully Connected !!!";

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What actually I am trying to do is, I am fetching ORacle DB connection string (for Ex : "dbi:Oracle:host=10.0.0.1;sid=dev;","queryeditor","editor") from one table and I am creating one more different DB connection using that DB connection string. So..during that time I am getting this error.



What could be the problem ? Is that the problem coz of am opening the same connection again ..?

Thanks a ton in Advance !

Warm Regards,
Saravanan

Replies are listed 'Best First'.
Re: Multiple DB Connection Problem
by snoopy (Curate) on May 31, 2007 at 06:43 UTC
    I think its the connection string. The following gives the same error: 
    #!/usr/bin/perl
use warnings; use strict;

use DBI;

my $dbconnectionstring = q{"dbi:Oracle:host=10.0.0.1;sid=dev;","querye
+ditor","editor"};

our $conn2 = DBI->connect($dbconnectionstring);
die($DBI::errstr) unless $conn2;

    [download]
    You need to parse your connection string to extract dsn, user and password and pass then as individual arguments to DBI's connect method: 
    use Text::CSV_XS;

my $csv = Text::CSV_XS->new({
                 sep_char => ",",
                 quote_char => '"',
              });

$csv->parse($dbconnectionstring);
my ($dsn,$user,$pass) = $csv->fields();

our $conn2 = DBI->connect($dsn, $user, $pass);
die($DBI::errstr) unless $conn2;

    [download]
[reply]
[d/l]
[select]
      Snoopy..Thanks for the suggestion.

      Is there any other way to do this multiple DB connection without using "use Text::CSV_XS;" module ?
[reply]
        You could split $dbconnectionstring on commas or if it were me, I would store the information in 3 different columns.
[reply]

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