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Asked: 2026-05-23T20:21:32+00:00

I am trying to connect to Oracle using Perl. I am trying to connect

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I am trying to connect to Oracle using Perl.

I am trying to connect from a Windows XP machine that has Perl installed. I also have downloaded Oracle SQL Developer and Oracle Instant Client. I can connect to the Oracle DB using Oracle SQL Developer using the TNS connection type.

I use the following Perl.

use DBI;
$db=DBI->connect( "dbi:Oracle", "username", "password" ) or die "Can't connect $DBI::errstr\n";

I get the following error message.

DBI connect(”,’username’,…) failed: ERROR
OCINlsEnvironmentVariableGet(OCI_NLS_CHARSET_ID) Check NLS settings etc. at oracle2.pl line3
Cant connect to database ERROR OCINlsEnvironmentVariableGet(OCI_NLS_CHARSET_ID) Check NLS settings etc.

Do I need to do anything with Oracle Instant Client because it does not have an installer? Is there something else that needs to be configured in Perl?

Are there any variables I need to set at the beginning of the Perl to link to either SQL Developer or Instant Client?

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1 Answer

  1. Editorial Team

    I used a different method to connect Perl to an Oracle DB. I used SQLPlus instead of DBI. This is a command line utility from Oracle that can be called from Perl. Below is a sample of my code. The test.sql file can contain one or multiple queries and must end with exit.

    my $connect_string = 'username/password@server'; # connection to the DB
my $file = 'test.sql'; # location of SQL file. The file must end with "exit"

my $sqlcmd = "sqlplus -S $connect_string \@$file"; # sqlcommand
system $sqlcmd; # executes command
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