Merge pull request #222 from shuipf/master

完善数据库驱动扩展

library/think/db/Connection.php

@@ -284,7 +284,7 @@ abstract class Connection
         if ($this->linkID) {
             return $this->linkID->getAttribute(PDO::ATTR_DRIVER_NAME);
         } else {
-            return basename(str_replace('\\', '/', $this->config['type']));
+            return $this->config['type'];
         }
     }
 

library/think/db/Query.php

@@ -359,7 +359,7 @@ class Query
         static $builder = [];
         $driver         = $this->driver;
         if (!isset($builder[$driver])) {
-            $class            = '\\think\\db\\builder\\' . ucfirst($driver);
+            $class            = false !== strpos($driver, '\\') ? $driver : '\\think\\db\\builder\\' . ucfirst($driver);
             $builder[$driver] = new $class($this->connection);
         }
         // 设置当前查询对象