Remove garbage comment

sql/sql_analyze_stmt.h

@@ -435,107 +435,3 @@ public:
   };
 };
 
-#if 0
-class Sort_and_group_tracker : public Sql_alloc
-{
-  enum { MAX_QEP_ACTIONS = 5 };
-
-  /* Query actions in the order they were made */
-  enum_qep_action qep_actions[MAX_QEP_ACTIONS];
-
-  /* Index in filesort_tracker or tmp_table_kind arrays */
-  int qep_action_idx[MAX_QEP_ACTIONS];
-  uint n_actions;
-  
-  /* 
-    Trackers for filesort operation. JOIN::exec() may need at most two sorting
-    operations.
-  */
-  Filesort_tracker filesort_tracker[2];
-  int cur_tracker;
-  
-  /* Information about temporary tables */
-  enum_tmp_table_use tmp_table_kind[2];
-  int cur_tmp_table;
-
-  //friend class Explain_select;
-
-public:
-  Sort_and_group_tracker() : 
-    n_actions(0),
-    cur_tracker(0),
-    cur_tmp_table(0)
-  {}
-
-  /*************** Reporting interface ***************/
-  /* Report that join execution is started */
-  void report_join_start()
-  {
-    n_actions= 0;
-    cur_tracker= 0;
-    cur_tmp_table= 0;
-  }
-
-  /* 
-    Report that a temporary table is created. The next step is to write to the
-    this tmp. table
-  */
-  void report_tmp_table(TABLE *tbl)
-  {
-    DBUG_ASSERT(n_actions < MAX_QEP_ACTIONS);
-    qep_actions[n_actions++]= EXPL_ACTION_TEMPTABLE;
-
-    DBUG_ASSERT(cur_tmp_table < 2);
-    cur_tmp_table++;
-  }
-
-  /* Report that we are doing a filesort. */
-  Filesort_tracker *report_sorting()
-  {
-    DBUG_ASSERT(n_actions < MAX_QEP_ACTIONS);
-    qep_actions[n_actions++]= EXPL_ACTION_FILESORT;
-
-    DBUG_ASSERT(cur_tracker < 2);
-    return &filesort_tracker[cur_tracker++];
-  }
-  
-  friend class Iterator;
-  /*************** Statistics retrieval interface ***************/
-  // need to iterate over steps
-#if 0
-  class Iterator 
-  {
-    Sort_and_group_tracker *owner;
-    uint idx;
-    int fs_tracker_idx;
-    //int tmp_table_idx;
-  public:
-    Iterator(Sort_and_group_tracker *owner_arg) : 
-      owner(owner_arg), idx(0), fs_tracker_idx(0)//, tmp_table_idx(0)
-    {}
-
-    enum_qep_action get_next(Filesort_tracker **tracker/*,
-                             enum_tmp_table_use *tmp_table_use*/)
-    {
-      /* Walk back through the array... */
-      if (idx >= owner->n_actions)
-        return EXPL_ACTION_EOF;
-      switch (owner->qep_actions[idx]) 
-      {
-        case EXPL_ACTION_FILESORT:
-          *tracker= &owner->filesort_tracker[fs_tracker_idx++];
-          break;
-        case EXPL_ACTION_TEMPTABLE:
-          //*tmp_table_use= tmp_table_kind[tmp_table_idx++];
-          break;
-        default:
-          break;
-      }
-      return owner->qep_actions[idx++];
-    }
-  };
-#endif
-  //enum_tmp_table_use get_tmp_table_type() { return join_result_tmp_table; }
-};
-#endif 
-