/**
* 事务查询
* @param string $sql
*/
protected function _query($sql)
{
try {
if ($this->db_driver->query($sql, null, true)) {
$status = true;
} else {
$status = false;
}
} catch (Exception $e) {
$status = false;
}
return $status;
}
/**
* 创建一个数据库
*
* @param string $database
* @param string $charset 编码，不传则使用数据库连接配置相同到编码
* @param string $collate 整理格式
* @return boolean
* @throws Exception
*/
public function create_database($database, $charset = null, $collate = null)
{
if (method_exists($this->driver, 'create_database')) {
return $this->driver->create_database($database, $charset, $collate);
} else {
return false;
}
}
/**
* 保存慢查询日志
*
* @param float $start_time 由 `$this->_start_slow_query()` 返回的值
*/
protected function _record_slow_query($start_time)
{
if (!$start_time) {
return;
}
$end_time = microtime(1);
$use_time = 1000 * ($end_time - $start_time);
if (($min_time = Database::_get_slow_query_setting_time()) && $use_time > $min_time) {
// 记录慢查询
Database::$slow_querys[] = array($start_time, $use_time, $this->driver->last_query());
}
}