use strict; use Text::CSV; 
my @lines=<DATA>;
my $csv = Text::CSV->new ({sep_char  => ', '  });

my @AoA;

for (@lines) { if    (/^\((.+?)\).?/){my $con=$1; 
 
  if ($csv->parse($con)) {
 
      my @fields = $csv->fields();   push @AoA,[@fields];
 
  } else {     warn "Line could not be parsed: $_\n";  }
}
}



$"="//";for (@AoA){print "no_fields: $#$_ : @$_\n";}

__DATA__
(101, '1997-02-25', 'S1', 31.00, NULL, 0.00, 'this becomes two fields, so no go', 5.11),
(102, '1998-03-26', 'S1', 31.00, NULL, 0.00, 'this will remain one field', 6.11),