# hash_key_cmp

use strict;
use warnings;

# Test data

our %CVS = (
    b   => 1,
    c   => 0,
    d   => 1,
    e   => 1,
    f   => 1,
    g   => 0,
    h   => 1,
    i   => 1,
    j   => 1,
    k   => 1,
    l   => 1,
);

our %SQL = (
    x_a   => 1,
    x_b   => 1,
    x_d   => 1,
    x_e   => 1,
    x_f   => 0,
    x_g   => 1,
    x_h   => 0,
    x_i   => 1,
    x_j   => 1,
    x_l   => 1,
    x__k  => 1,
    x_m   => 0,
);


# Compare hashes

(my $prefix = (each %SQL)[0]) =~ s/^(.+_)?.*/$1/;
my $prefix_len = length $prefix;

my (@valid_in_both, @bad_in_both, @not_in_sql, @not_in_cvs);

map { exists $SQL{join '', $prefix, $_}
        ? $CVS{$_} eq $SQL{join '', $prefix, $_}
                ? push(@valid_in_both, $_)
                : push(@bad_in_both, $_)
        : push(@not_in_sql, $_)
    } keys %CVS;

@not_in_cvs = grep { ! exists($CVS{substr $_, $prefix_len}) } keys %SQL;


# Output results

print 'Not in SQL:    ', "@not_in_sql", "\n";
print 'Not in CVS:    ', "@not_in_cvs", "\n";
print 'Valid in both: ', "@valid_in_both", "\n";
print 'Bad in both:   ', "@bad_in_both", "\n";