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/* Copyright (C) 2005 MySQL AB
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef STORAGE_BLACKHOLE_HA_BLACKHOLE_H
#define STORAGE_BLACKHOLE_HA_BLACKHOLE_H
#include <drizzled/handler.h>
#include <mysys/thr_lock.h>
#define BLACKHOLE_MAX_KEY 64 /* Max allowed keys */
#define BLACKHOLE_MAX_KEY_SEG 16 /* Max segments for key */
#define BLACKHOLE_MAX_KEY_LENGTH 1000
/*
Shared structure for correct LOCK operation
*/
struct st_blackhole_share {
THR_LOCK lock;
uint32_t use_count;
uint32_t table_name_length;
char table_name[1];
};
/*
Class definition for the blackhole storage engine
"Dumbest named feature ever"
*/
class ha_blackhole: public handler
{
THR_LOCK_DATA lock; /* MySQL lock */
st_blackhole_share *share;
public:
ha_blackhole(handlerton *hton, TABLE_SHARE *table_arg);
~ha_blackhole()
{
}
/* The name that will be used for display purposes */
const char *table_type() const { return "BLACKHOLE"; }
/*
The name of the index type that will be used for display
don't implement this method unless you really have indexes
*/
const char *index_type(uint32_t key_number);
const char **bas_ext() const;
uint64_t table_flags() const
{
return(HA_NULL_IN_KEY |
HA_BINLOG_STMT_CAPABLE |
HA_CAN_INDEX_BLOBS |
HA_AUTO_PART_KEY |
HA_FILE_BASED);
}
uint32_t index_flags(uint32_t inx, uint32_t part, bool all_parts) const;
/* The following defines can be increased if necessary */
uint32_t max_supported_keys() const { return BLACKHOLE_MAX_KEY; }
uint32_t max_supported_key_length() const { return BLACKHOLE_MAX_KEY_LENGTH; }
uint32_t max_supported_key_part_length() const { return BLACKHOLE_MAX_KEY_LENGTH; }
int open(const char *name, int mode, uint32_t test_if_locked);
int close(void);
int write_row(unsigned char * buf);
int rnd_init(bool scan);
int rnd_next(unsigned char *buf);
int rnd_pos(unsigned char * buf, unsigned char *pos);
int index_read_map(unsigned char * buf, const unsigned char * key, key_part_map keypart_map,
enum ha_rkey_function find_flag);
int index_read_idx_map(unsigned char * buf, uint32_t idx, const unsigned char * key,
key_part_map keypart_map,
enum ha_rkey_function find_flag);
int index_read_last_map(unsigned char * buf, const unsigned char * key, key_part_map keypart_map);
int index_next(unsigned char * buf);
int index_prev(unsigned char * buf);
int index_first(unsigned char * buf);
int index_last(unsigned char * buf);
void position(const unsigned char *record);
int info(uint32_t flag);
int external_lock(Session *session, int lock_type);
int create(const char *name, Table *table_arg,
HA_CREATE_INFO *create_info);
THR_LOCK_DATA **store_lock(Session *session,
THR_LOCK_DATA **to,
enum thr_lock_type lock_type);
};
#endif /* STORAGE_BLACKHOLE_HA_BLACKHOLE_H */
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