/**
* Init virtual grid records for entity
*
* @return $this
*/
protected function _initVirtualGridColumns()
{
parent::_initVirtualGridColumns();
$adapter = $this->getReadConnection();
$ifnullFirst = $adapter->getIfNullSql('{{table}}.firstname', $adapter->quote(''));
$ifnullLast = $adapter->getIfNullSql('{{table}}.lastname', $adapter->quote(''));
$concatAddress = $adapter->getConcatSql(array($ifnullFirst, $adapter->quote(' '), $ifnullLast));
$this->addVirtualGridColumn('billing_name', 'sales_flat_order_address', array('billing_address_id' => 'entity_id'), $concatAddress)->addVirtualGridColumn('shipping_name', 'sales_flat_order_address', array('shipping_address_id' => 'entity_id'), $concatAddress);
return $this;
}
