How does \Zend_Db_Select::getPart() work?

dmitry_fedyuk · April 29, 2016, 4:08pm

Context: How does \Magento\Framework\Data\Collection\AbstractDb::getSelectCountSql() work?

zendframework/zf1/blob/release-1.12.16/library/Zend/Db/Select.php#L658-L673


/**
 * Get part of the structured information for the current query.
 *
 * @param string $part
 * @return mixed
 * @throws Zend_Db_Select_Exception
 */
public function getPart($part)
{
    $part = strtolower($part);
    if (!array_key_exists($part, $this->_parts)) {
        require_once 'Zend/Db/Select/Exception.php';
        throw new Zend_Db_Select_Exception("Invalid Select part '$part'");
    }
    return $this->_parts[$part];
}