Merge branch ztflow-liugang-release/21.7.1#liugang of zentao/zentaopms (#8897)

lib/dbh/dbh.class.php

@@ -59,6 +59,15 @@ class dbh
      */
     private $sql;
 
+    /**
+     * 执行的请求，所有的查询都保存在该数组。
+     * The queries executed. Every query will be saved in this array.
+     *
+     * @var array
+     * @access public
+     */
+    public static $queries = [];
+
     /**
      * Constructor
      *