Hi Monks!
I have made a script with Perl and Mysql, executing queries. The script works fine, the thing I would like to change -if possible- is to not need to write the credentials all the time, but only when I first execute it, and then somehow they remain stored until I logout or something.
My script looks as follows:
use strict;
use warnings;
use Term::ReadKey;
use DBI;
use List::Util qw( min max );
use Data::Types qw/:all/;
use DateTime;
use DateTime::Format::Strptime;
use Date::Calc qw(:all);

my $dates_file = $ARGV[0];

my $dsn = "DBI:mysql:DiabetesDB";
print "Please give your username:";
my $username =  <STDIN>;
chomp $username;

ReadMode(0);
print "Password for user \"$username:\"";        
ReadMode('noecho');
my $password = ReadLine(0);
ReadMode 'normal';
chomp $password;

# connect to MySQL database
my %attr =  (   PrintError=>0,      # turn off error reporting via war
+n()
                RaiseError=>1       # turn on error reporting via die(
+)           
            );

my $dbh = DBI->connect($dsn,$username,$password, \%attr);
print "\nUser \"".$username."\" is connected to the \"DiabetesDB\" dat
+abase.\n";

my ($patient_id_date, $specific_date, $wanted_date, $type_of_search, $
+max_window, $sql_query)='';

open DATES, $dates_file;
while(<DATES>)
{
    chomp;
    if($_=~/^(.*?)\t(.*?)\t(\d+)\t(.*)/)
    {
        $patient_id_date=$1;
        $specific_date=$2;
        $max_window=$3;
        $type_of_search=$4;

        my %p; 
        @p{qw(year month day)} = split /\//, $specific_date;
        my $dt = DateTime->new(%p);

        my $wanted_date = $dt->clone->add(months => $max_window)->strf
+time('%Y/%m/%d'); #this is the date I am interested in, +X months

        if($type_of_search eq 'past')
        {
            $sql_query = "SELECT * FROM MEASUREMENTS WHERE MEASUREMENT
+S.patient_id='".$patient_id_date.
                         "' AND MEASUREMENTS.measure_date<'".$wanted_d
+ate."' ORDER BY MEASUREMENTS.measure_date DESC LIMIT 1";
        }

        elsif($type_of_search eq 'future')
        {
            $sql_query = "SELECT * FROM MEASUREMENTS WHERE MEASUREMENT
+S.patient_id='".$patient_id_date. 
                         "' AND MEASUREMENTS.measure_date>'".$wanted_d
+ate."' ORDER BY MEASUREMENTS.measure_date ASC LIMIT 1";
        }

        elsif($type_of_search eq 'both')
        {
            $sql_query = "(SELECT * FROM MEASUREMENTS WHERE MEASUREMEN
+TS.patient_id='".$patient_id_date. 
                         "' AND MEASUREMENTS.measure_date<'".$wanted_d
+ate."' ORDER BY MEASUREMENTS.measure_date DESC LIMIT 1)".
                         "  UNION (SELECT * FROM MEASUREMENTS WHERE ME
+ASUREMENTS.patient_id='".$patient_id_date.
                         "' AND MEASUREMENTS.measure_date>'".$wanted_d
+ate."' ORDER BY MEASUREMENTS.measure_date ASC LIMIT 1)";
        
        }

        my $sth = $dbh->prepare($sql_query);
        $sth->execute();
        $sth->dump_results( );
        $sth->finish();
        print "\n";
    }
}
close DATES;

[download]

So, as you can see, the user is asked to provide his/her credentials when calling the script. I was wondering if there is a way so that the user does it once, but if they re-run the script 2 mins later, they can still be "logged in" on the Mysql server. Is that possible, and, if yes, how does one go about it?

Thanks!

In reply to can one create a "session" of Perl & Mysql? by Anonymous Monk

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