matthew-valenti

// app/code/local/Aydus/Reference/sql/aydus_reference_setup/install-1.0.0.php
<?php

$installer = $this;
$installer->startSetup();

// Add column to sales_flat_quote and sales_flat_order. Magento does not support EAV for order/quote.
$salesInstaller = Mage::getResourceModel('sales/setup', 'sales_setup');
$options = array('type' => 'varchar', 'visible' => true, 'required' => false);
$salesInstaller->addAttribute('quote', 'reference', $options);