This is a Database question. I am trying to use Perl-DBI from a Linux system to talk to a SQL Server Database, using the new Microsoft SQL Server driver for Linux. After several hours of effort (spread across a week), I am maddeningly close but just short of success. I've established connectivity to the database (verified with Wireshark) using command line utilities, but for some as-yet undetermined reason Perl-DBI fails to connect (or even access the network).

Much of what I've accomplished thus far required piecing through a large mass of contradictory and obsolete web pages, so once I get over this hurdle I have the making of a good wiki page for setting up from scratch, which I would be happy to submit for the common good out of gratitude. Details follow:

Basic Setup

Results

I have verified I can access the database with both the isql and sqlcmd utilities (double-checked with wireshark):

However, when I try a simple Perl-DBI program, I get an error.

% cat simple.pl
#!/usr/bin/perl
use DBI;
my $dsn="dbi:ODBC:driver={ODBC Driver 11 for SQL Server};server=tul1sy
+stem;database=Mosaic"; # SOLVED: keyword "DRIVER=" needs to be all ca
+ps
my $dbh = DBI->connect($dsn, "user334", "2BEvPog");

if (! defined($dbh) ) {
    print "***Error connecting to DSN\n";
    print "***Error was:\n";
    print "***$DBI::errstr\n";         # $DBI::errstr is the error
}

% simple.pl
DBI connect('driver={ODBC Driver 11 for SQL Server};server=tul1cspeldb
+02;database=Mosaic','user334',...) failed: [unixODBC][Driver Manager]
+Data source name not found, and no default driver specified (SQL-IM00
+2) at ./simple.pl line 6
***Error connecting to DSN
***Error was:
***[unixODBC][Driver Manager]Data source name not found, and no defaul
+t driver specified (SQL-IM002)

[download]

I have tried many variants of connection string, including the following (with various case variations):

my $dsn="dbi:ODBC:driver={tul1system};server=tul1system;database=Mosai
+c";
my $dsn="dbi:ODBC:driver={tul1system};server=tul1system;database=Mosai
+c;user=user334;pwd=2BEvPog";
my $dsn="dbi:ODBC:driver={tul1system};server=tul1system;database=Mosai
+c";
my $dsn="dbi:ODBC:driver={tul1system};server=tul1system;database=Mosai
+c;user=user334;pwd=2BEvPog";
my $dsn="dbi:ODBC:driver=tul1system;server=tul1system;database=Mosaic"
+;
my $dsn="dbi:ODBC:driver=tul1system;server=tul1system;database=Mosaic;
+user=user334;pwd=2BEvPog";
my $dsn="dbi:ODBC:driver={ODBC Driver 11 for SQL Server};server=tul1sy
+stem;database=Mosaic;user=iser334;pwd=2BEvPog";

[download]

In all cases, not only does the dbi_connect() fail, but Wireshark confirms there is no traffic on the wire. This is clearly something fundamental, but I've run out of ideas. How does one debug a failed DBI connect()?

In reply to fail: Linux Perl-DBI to SQL Server by madmole

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