I think you're making too much work for yourself, someone has already done it for you.
I highly recommend SQL:Abstract
The rest is shamelessly ripped from module
the docs:
This module can generate pretty complicated WHERE statements easily.
For example, simple key=value pairs are taken to mean equality, and
if you want to see if a field is within a set of values, you can use
an arrayref. Let's say we wanted to SELECT some data based on your criteria:
use SQL::Abstract;
my $sql = SQL::Abstract->new;
my %where = (
name => 'smith',
salary => {'>', 50000},
department => { 'not like', 'eng%' }
);
my($stmt, @bind) = $sql->select($table, *, \%where, \@order);
This module also handles insert, update and delete, as well as ORing and ANDing your conditional clauses
--
Clayton
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