Hello fellow Monks,

I am trying to get MSSQL and FreeTDS to return the value of an autoincrement of a primary key after an insert. This is not the first time this has been asked here: $code or die asked in DBI and primary keys, and was correctly informed that the system variable @@IDENTITY contained the desired value, and then indicated in a followup to that thread (here) that SQL of the form 

insert into table .......... select @@IDENTITY

[download]
would get the desired value (MSSQL allows you to put multiple statements on one line like that).

All of this is well and good, but I believe $code or die was working on Perl in a Windows environment; I want to make it just that more difficult and use FreeTDS from a linux box to do the work. Here is the test code I have written: 

#!/usr/local/bin/perl -w
use DBI;
use strict;

$ENV{'SYBASE'} = '/usr/local/freetds';
$ENV{'TDSVER'} = 70;

my $server = "server";
my $db = "db";
my $user = "sqluser";
my $passwd = "sqluserpasswd";

my $dbh = DBI->connect("dbi:Sybase:server=$server;database=$db",$user,
+$passwd)
  or die "--$!--\n";

my $sth = $dbh->prepare(' insert into sctemp (scratch) values (42) sel
+ect @@IDENTITY as foo');
$sth->execute;

my $data =  $sth->fetchrow_hashref;
my $seqid=  $$data{foo};
my $err  =  $sth->errstr;
print "$seqid, $err\n";

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In addition to fetchrow_hashref, I have tried fetchrow_array and fetch, changing the assignment to $seqid to the right syntax. So here's the problem: the value of $seqid seems to be getting truncated. The value of @@IDENITY is currently on the order of 20, but when I print $seqid, I get 2 (until I got the ID up to 20, I thought I was getting a return value of 1). The error string is empty, as it should be, since nothing seems to be going wrong on the database side (when I run the command in Query Analyzer, it works fine). So it now looks like a bug in FreeTDS, but I am not sure. Does anyone see any other problems in my code that could explain what I am seeing?

Thanks,
Scott

In reply to Getting identity after autoincr in FreeTDS/MSSQL/DBI by scain

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