getConnection() ->addColumn($installer->getTable('sales/order_item'), 'base_tax_refunded', array( 'type' => Varien_Db_Ddl_Table::TYPE_DECIMAL, 'comment' => 'Base Tax Refunded', 'scale' => 4, 'precision' => 12, )); $installer->getConnection() ->addColumn($installer->getTable('sales/order_item'), 'discount_refunded', array( 'type' => Varien_Db_Ddl_Table::TYPE_DECIMAL, 'comment' => 'Discount Refunded', 'scale' => 4, 'precision' => 12, )); $installer->getConnection() ->addColumn($installer->getTable('sales/order_item'), 'base_discount_refunded', array( 'type' => Varien_Db_Ddl_Table::TYPE_DECIMAL, 'comment' => 'Base Discount Refunded', 'scale' => 4, 'precision' => 12, ));