- [refac] remove queries that have been executed in dbh class.

framework/base/router.class.php

@@ -3134,7 +3134,6 @@ class baseRouter
         try
         {
             $dbh = new dbh($params, true, $flag);
-            $dbh->exec("SET NAMES {$params->encoding}");
 
             /*
              * 如果系统是Linux，开启仿真预处理和缓冲查询。
@@ -3148,7 +3147,6 @@ class baseRouter
             $dbh->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
             $dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
             $dbh->setAttribute(PDO::ATTR_ORACLE_NULLS, PDO::NULL_TO_STRING);
-            if(isset($params->strictMode) and !$params->strictMode) $dbh->exec("SET @@sql_mode= ''");
             if(isset($params->emulatePrepare)) $dbh->setAttribute(PDO::ATTR_EMULATE_PREPARES, $params->emulatePrepare);
             if(isset($params->bufferQuery))    $dbh->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, $params->bufferQuery);