This is the dumper code I've written; it assumes there's a .my.cnf file in /home/user with connect info. Data::Dumper manages the serialization.

#!/usr/local/bin/perl -w

use strict;
use DBI;
use Data::Dumper;

# Connect to database
my $dbh;
eval {
    $dbh = DBI->connect("dbi:mysql:;mysql_read_default_file=/home/user
+/.my.cnf", 
                        "",
                        "",
                        { RaiseError => 1, PrintError => 0 }
                       );
    1;
} or die "Couldn't connect to database: $DBI::errstr";

# Get a list of the tables
my @table_names;
eval {
    @table_names = @{$dbh->selectcol_arrayref("SHOW TABLES")};
    1;
} or die "Couldn't retrieve list of MySQL tables: $DBI::errstr";

# Get data from each table
my (@tables, $table);
eval {
    foreach $table (@table_names) {
        # Record how the table is layed out
        my $layout = $dbh->selectall_arrayref("DESCRIBE $table");
        # Store the data in a 2D array reference
        my @fields = map ${$_}[0], @{$layout};
        my $data = $dbh->selectall_arrayref("SELECT " .
                                            (join ',', @fields) .
                                            " FROM $table");
        push @tables, [$layout, $data];
    }
    1;
} or die "Failed while obtaining data from $table: $DBI::errstr";

# Print data to STDOUT
my %database;
@database{@table_names} = @tables;

$Data::Dumper::Useqq = 1;
$Data::Dumper::Indent = 0;
print Data::Dumper->Dump([\%database], ['database']);

eval {
    $dbh->disconnect;
    1;
} or die "Couldn't disconnect properly from database: $DBI::errstr";
[download]

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