This is covered in DBI::FAQ ... but the answer isn't all that helpfull. the basic idea is that:

• DBI doesn't provide anyway to call any DB specific Stored procs, but you can run any SQL, which might include SQL that calls a stored proc.
• any SQL which sets a value can be used to set a value that you have bound using bind_param_inout

In some databases, you could do this like so...

my $rv  = 0;
my $dbh = DBI->connect(...);
my $sth = $dbh->prepare('{?=call name_of_sproc()}');
$sth->bind_param_inout(1, \$rv, 4);
$sth->execute();
$sth->finish();
print "return value: $rv\n";
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