Method copy_ref_ptr_array

sql/sql_select.h:1819–1828

Overwrites one slice with the contents of another slice. In the normal case, dst and src have the same size(). However: the rollup slices may have smaller size than slice_sz. */

     However: the rollup slices may have smaller size than slice_sz.
   */
  void copy_ref_ptr_array(Ref_ptr_array dst_arr, Ref_ptr_array src_arr)
  {
    DBUG_ASSERT(dst_arr.size() >= src_arr.size());
    if (src_arr.size() == 0)
      return;

    void *dest= dst_arr.array();
    const void *src= src_arr.array();
    memcpy(dest, src, src_arr.size() * src_arr.element_size());
  }

  /// Overwrites 'ref_ptrs' and remembers the source as 'current'.
  void set_items_ref_array(Ref_ptr_array src_arr)