Profiler.php

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<?php
namespace Magento\Framework\DB;

class Profiler extends \Zend_Db_Profiler
{
    protected $_host = '';

    protected $_type = '';

    private $_lastQueryId = null;

    public function setHost($host)
    {
        $this->_host = $host;
        return $this;
    }

    public function setType($type)
    {
        $this->_type = $type;
        return $this;
    }

    public function queryStart($queryText, $queryType = null)
    {
        $this->_lastQueryId = parent::queryStart($queryText, $queryType);
        return $this->_lastQueryId;
    }

    public function queryEnd($queryId)
    {
        $this->_lastQueryId = null;
        return parent::queryEnd($queryId);
    }

    public function queryEndLast()
    {
        if ($this->_lastQueryId !== null) {
            return $this->queryEnd($this->_lastQueryId);
        }

        return self::IGNORED;
    }
}