Why does the following query return the correct value in SQL*Plus (Oracle command-line SQL interface), but returns nothing using the DBI?

SELECT server_id
FROM   wms_rf_server
WHERE  server_name = 'splwebdev.unix.us.tld.com'

[download]

The Perl code I am using to execute this SQL is:

use strict;
use warnings;
use DBI qw(:sql_types);

my $dbh = DBI->connect('dbi:Oracle:db','user','pass',
    { AutoCommit => 0, RaiseError => 1, PrintError => 1 }
) or die "Unable to connect!: $!\n";

my $sql = qq{
    SELECT server_id
    FROM   wms_rf_server
    WHERE  server_name = 'splwebdev.unix.us.tld.com'
};
my $server_id;
my $sth = $dbh->prepare($sql);
$sth->execute();
my $rv = $sth->bind_columns(\$server_id);

print "Returned server_id = [$server_id]\n" if $server_id;

$sth->finish();
$dbh->disconnect();

[download]

No exceptions are raised, and the program ends normally, without displaying anything. I am new to DBI, so I know that I must be overlooking something simple. Please let me know if you see anything obvious, or give me suggestions for troubleshooting this.

Thanks,
Akoya

In reply to Why does the same SQL return different results in the DBI and in SQL*Plus? by Akoya

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.