#!perl
use strict;	
use DBI;

# set up database
my $dbh = DBI->connect ("dbi:CSV:", undef, undef, {
  csv_tables  => {
    customer => { 
      f_file    => "customers.txt" ,
      col_names => ['NAME','TELNO','EMAIL'],
    }
  },
  csv_sep_char => " ",
}) or die $DBI::errstr;
        
print "Type 'q' to exit\n";
my @field = ('Name','TelNo','Email');
my $i=0; my $input;
while (1) {
  do {
  # get input
    $i = 0 if $field[$i] eq '';
    print $field[$i]."? ";
    chomp($input = <STDIN>);
    ++$i;
  } until ($input) ;
  --$i;
  last if (lc $input eq 'q');
  
  # query database
  my $fld = $field[$i];
  print "Search for $fld contains '$input'\n";
  my $sth = $dbh->prepare("SELECT * FROM customer 
                           WHERE $fld CLIKE ?"); # ignore case
  $sth->execute('%'.$input.'%');
  my $count;
  while (my @f = $sth->fetchrow_array){
    ++$count;
    print "$count $fld : $f[$i] -> $f[0] $f[1] $f[2]\n";
  }
  print "Customer record not found. \n" unless ($count);
  $input='';
}