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Re^2: fail: Linux Perl-DBI to SQL Server

by madmole (Novice)
on May 16, 2013 at 01:43 UTC ( #1033752=note: print w/replies, xml ) Need Help??

in reply to Re: fail: Linux Perl-DBI to SQL Server
in thread fail: Linux Perl-DBI to SQL Server


I have figured out what is going on and succeeded in connecting. The root of the problem is understanding the concept of a DSN. The basic syntax is:


where dsn_name is a string that is used to index into a section header of one of the .ini files (e.g. odbcinst.ini).

The problem is that there is an alternate syntax known as DSN-less connection strings (curly brackets) which essentially contains connection information inline. For some reason I never got this to work correctly, I believe because the DSN-less syntax never connected to the location of the driver .so file. When I refashioned my example to use DSN syntax the example succeeded. My updated code fragment looks like this:

% cat #!/usr/bin/perl use DBI; my $dsn="dbi:ODBC:DSN=tul1system"; 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 }

Note that the other information like database name and IP address now come from the .ini file.

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[Corion]: choroba: Yeah - I found that if you have the "right" datastructure from the start, it's fairly easy, but if you have some global datastructure that you mutate, you have to rewrite a lot to pass around the results instead.
[Corion]: I find the process quite similar to (in Prolog) passing around an accumulator variable in recursive predicates
[1nickt]: Good morning, brainy monks!
[marto]: Hi 1nickt, I know it's early days, but how is the new job?
[Corion]: Hi 1nickt!
[Corion]: Ohai marto!

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