startSetup(); $installer->getConnection()->addColumn($installer->getTable('sales/invoice_comment'), 'is_visible_on_front', 'tinyint(1) unsigned not null default 0 after `is_customer_notified`'); $installer->getConnection()->addColumn($installer->getTable('sales/shipment_comment'), 'is_visible_on_front', 'tinyint(1) unsigned not null default 0 after `is_customer_notified`'); $installer->getConnection()->addColumn($installer->getTable('sales/creditmemo_comment'), 'is_visible_on_front', 'tinyint(1) unsigned not null default 0 after `is_customer_notified`'); $installer->endSetup();