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/* Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#ifndef FILESORT_INCLUDED
#define FILESORT_INCLUDED
class SQL_SELECT;
#include "my_global.h" /* uint, uchar */
#include "my_base.h" /* ha_rows */
class SQL_SELECT;
class THD;
struct TABLE;
typedef struct st_sort_field SORT_FIELD;
ha_rows filesort(THD *thd, TABLE *table, st_sort_field *sortorder,
uint s_length, SQL_SELECT *select,
ha_rows max_rows, bool sort_positions,
ha_rows *examined_rows);
void filesort_free_buffers(TABLE *table, bool full);
double get_merge_many_buffs_cost(uint *buffer, uint last_n_elems,
int elem_size);
void change_double_for_sort(double nr,uchar *to);
#endif /* FILESORT_INCLUDED */
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