How do you display a Magento sql query as a string?

Magento constructs its SQL queries like

 $this->getSelect()->joinInner(
        array('sbao' => $this->getTable('sales/billing_agreement_order')),
        'main_table.entity_id = sbao.order_id',
        array()
    )

Is there a way to display the resulting query in a string format rather than printing out the huge object e.g.

echo $this->getSelect()->joinInner(
        array('sbao' => $this->getTable('sales/billing_agreement_order')),
        'main_table.entity_id = sbao.order_id',
        array()
    )->开发者_JAVA技巧;toString();

$select = $this->getSelect()->joinInner(
        array('sbao' => $this->getTable('sales/billing_agreement_order')),
        'main_table.entity_id = sbao.order_id',
        array()
    );

echo $select;

I nearly had it for those interested you need to use ->__toString() e.g.

echo $this->getSelect()->joinInner(
    array('sbao' => $this->getTable('sales/billing_agreement_order')),
    'main_table.entity_id = sbao.order_id',
    array()
)->__toString()