I'm in the process of moving some of my stuff over from one Linux box to a newer box. During this transition, one of the scripts I use regularly does something like this (greatly simplified for posting purposes): 

#! /usr/bin/perl -w

use strict;
use DBI;
use FindBin;

my $new_total = 10;

open my $fh, '>', $FindBin::Bin . '/data';
print $fh ("DATE,NUMBER\n2005-05-16,2\n2005-05-17,4\n");
close $fh;

my $dbh = DBI->connect('dbi:CSV:f_dir=' . $FindBin::Bin . ";csv_eol=\n
+")
    or warn "Can't connect to DBI";

my $total = $dbh->selectall_arrayref('select sum(number) from data')->
+[0][0];
if ($total||0 != $new_total)
{
    require Time::localtime;
    my $lt = Time::localtime::localtime(time();
    my $date = sprintf("%04d-%02d-%02d", $lt->year + 1900, $lt->mon + 
+1, $lt->mday);
    my $count = $dbh->selectall_arrayref('select count(*) from data wh
+ere date = ?', {}, $date)->[0][0];
    my $cur = $dbh->selectall_arrayref('select number from data where 
+date = ?', {}, $date);
    $cur = $cur->[0] while $cur and ref $cur;
    my $gained = $new_total - ($total||0);
    if ($count)
    {
        $cur += $gained;
        print "Updating today ($date) to be Number = $cur\n";
        $dbh->do('update data set number = ? where date = ?', {}, $cur
+, $date);
    }
    else
    {
        $cur = $gained;
        print "Inserting into today to be Number = $cur\n";
        $dbh->do('insert into data (date,number) values(?,?)', {}, $da
+te,$cur);
    }
}

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In this example code, lines 9 through 11 create a sample CSV data file - if your local time when you try this is not in the sample data, add it. The problem only exists in the update scenario, not the insert scenario, and I want to make as self-contained of an example as possible. The rest of the code is pretty much the same as what I'm using, but obviously doesn't work. I expect the file 'data' to look like this afterwards: 
DATE,NUMBER
2005-05-16,2
2005-05-17,8

[download]
However, it actually looks like this: 
DATE,NUMBER
2005-05-16,2
2005-05-17,2005-05-17

[download]
I'm using: 
$ perl -MDBD::CSV -e 'print "perl\t$]\n"; print $_,"\t",${$_."::VERSIO
+N"},$/ foreach @ARGV' DBD::CSV SQL::Statement SQL::Parser Text::CSV_X
+S SQL::Statement::Util
perl    5.008005
DBD::CSV        0.22
SQL::Statement  1.14
SQL::Parser     1.13
Text::CSV_XS    0.23
SQL::Statement::Util    -1, set by base.pm

[download]
On another machine, the same command returns: 
perl    5.008006
DBD::CSV    0.21
SQL::Statement    1.09
SQL::Parser    1.09
Text::CSV_XS    0.23
SQL::Statement::Util

[download]
and the update works fine. I suspect a problem in DBD::CSV, SQL::Statement, or SQL::Parser, but I'm not sure how to figure it out for sure. I suppose my workaround is to either find a way to uninstall these and install the older versions (which is kind of a pain), or to delete/reinsert rather than use update. Or maybe to get rid of the ?'s and put my number right in the string - which isn't that bad in my case, but if I'm really encountering a bug, I wouldn't want tossing ?'s out of one's repertoire to be the standard response...

If anyone has any other considerations, I'd be open to them. Otherwise, I'll submit this to the current maintainer of DBD::CSV (who will probably forward it on somewhere else, but that's as far as I understand this situation at the moment). Thanks!

In reply to DBD::CSV, SQL::Statement, and UPDATE table statement by Tanktalus

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