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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 02110-1335 USA */
#ifndef KEY_INCLUDED
#define KEY_INCLUDED
class Field;
class String;
struct TABLE;
typedef struct st_bitmap MY_BITMAP;
typedef struct st_key KEY;
typedef struct st_key_part_info KEY_PART_INFO;
int find_ref_key(KEY *key, uint key_count, uchar *record, Field *field,
uint *key_length, uint *keypart);
void key_copy(uchar *to_key, const uchar *from_record, const KEY *key_info,
uint key_length, bool with_zerofill= FALSE);
void key_restore(uchar *to_record, const uchar *from_key, KEY *key_info,
uint key_length);
bool key_cmp_if_same(TABLE *form,const uchar *key,uint index,uint key_length);
void key_unpack(String *to, TABLE *table, KEY *key);
void field_unpack(String *to, Field *field, const uchar *rec, uint max_length,
bool prefix_key);
bool is_key_used(TABLE *table, uint idx, const MY_BITMAP *fields);
int key_cmp(KEY_PART_INFO *key_part, const uchar *key, uint key_length);
ulong key_hashnr(KEY *key_info, uint used_key_parts, const uchar *key);
bool key_buf_cmp(KEY *key_info, uint used_key_parts,
const uchar *key1, const uchar *key2);
extern "C" int key_rec_cmp(const KEY *const *key_info, const uchar *a,
const uchar *b);
int key_tuple_cmp(KEY_PART_INFO *part, const uchar *key1, const uchar *key2,
uint tuple_length);
#endif /* KEY_INCLUDED */
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