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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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; either version 2 of the License, or
(at your option) any later version.
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 */
#ifdef __GNUC__
#pragma interface /* gcc class implementation */
#endif
/* class for the the myisam handler */
#include <db.h>
#define BDB_HIDDEN_PRIMARY_KEY_LENGTH 5
typedef struct st_berkeley_share {
ulonglong auto_ident;
THR_LOCK lock;
pthread_mutex_t mutex;
char *table_name;
uint table_name_length,use_count;
bool primary_key_inited;
} BDB_SHARE;
class ha_berkeley: public handler
{
THR_LOCK_DATA lock;
DBT last_key,current_row;
gptr alloc_ptr;
byte *rec_buff;
char *key_buff, *key_buff2, *primary_key_buff;
DB *file, **key_file;
DB_TXN *transaction;
u_int32_t *key_type;
DBC *cursor;
BDB_SHARE *share;
ulong int_option_flag;
ulong alloced_rec_buff_length;
uint primary_key,last_dup_key, hidden_primary_key;
bool fixed_length_row, fixed_length_primary_key, key_read;
bool fix_rec_buff_for_blob(ulong length);
byte current_ident[BDB_HIDDEN_PRIMARY_KEY_LENGTH];
ulong max_row_length(const byte *buf);
int pack_row(DBT *row,const byte *record, bool new_row);
void unpack_row(char *record, DBT *row);
void ha_berkeley::unpack_key(char *record, DBT *key, uint index);
DBT *pack_key(DBT *key, uint keynr, char *buff, const byte *record);
DBT *pack_key(DBT *key, uint keynr, char *buff, const byte *key_ptr,
uint key_length);
int remove_key(DB_TXN *trans, uint keynr, const byte *record,
DBT *packed_record, DBT *prim_key);
int remove_keys(DB_TXN *trans,const byte *record, DBT *new_record,
DBT *prim_key, key_map keys, int result);
int key_cmp(uint keynr, const byte * old_row, const byte * new_row);
int update_primary_key(DB_TXN *trans, bool primary_key_changed,
const byte * old_row, const byte * new_row,
DBT *prim_key);
int read_row(int error, char *buf, uint keynr, DBT *row, DBT *key, bool);
DBT *get_pos(DBT *to, byte *pos);
public:
ha_berkeley(TABLE *table): handler(table), alloc_ptr(0),rec_buff(0), file(0),
int_option_flag(HA_READ_NEXT | HA_READ_PREV |
HA_REC_NOT_IN_SEQ |
HA_KEYPOS_TO_RNDPOS | HA_READ_ORDER | HA_LASTKEY_ORDER |
HA_LONGLONG_KEYS | HA_NULL_KEY | HA_HAVE_KEY_READ_ONLY |
HA_BLOB_KEY | HA_NOT_EXACT_COUNT |
HA_PRIMARY_KEY_IN_READ_INDEX | HA_DROP_BEFORE_CREATE),
last_dup_key((uint) -1)
{
}
~ha_berkeley() {}
const char *table_type() const { return "BerkeleyDB"; }
const char **bas_ext() const;
ulong option_flag() const { return int_option_flag; }
uint max_record_length() const { return HA_MAX_REC_LENGTH; }
uint max_keys() const { return MAX_KEY-1; }
uint max_key_parts() const { return MAX_REF_PARTS; }
uint max_key_length() const { return MAX_KEY_LENGTH; }
uint extra_rec_buf_length() { return BDB_HIDDEN_PRIMARY_KEY_LENGTH; }
ha_rows estimate_number_of_rows();
bool fast_key_read() { return 1;}
bool has_transactions() { return 1;}
int open(const char *name, int mode, uint test_if_locked);
int close(void);
double scan_time();
int write_row(byte * buf);
int update_row(const byte * old_data, byte * new_data);
int delete_row(const byte * buf);
int index_init(uint index);
int index_end();
int index_read(byte * buf, const byte * key,
uint key_len, enum ha_rkey_function find_flag);
int index_read_idx(byte * buf, uint index, const byte * key,
uint key_len, enum ha_rkey_function find_flag);
int index_next(byte * buf);
int index_next_same(byte * buf, const byte *key, uint keylen);
int index_prev(byte * buf);
int index_first(byte * buf);
int index_last(byte * buf);
int rnd_init(bool scan=1);
int rnd_end();
int rnd_next(byte *buf);
int rnd_pos(byte * buf, byte *pos);
void position(const byte *record);
void info(uint);
int extra(enum ha_extra_function operation);
int reset(void);
int external_lock(THD *thd, int lock_type);
void position(byte *record);
ha_rows records_in_range(int inx,
const byte *start_key,uint start_key_len,
enum ha_rkey_function start_search_flag,
const byte *end_key,uint end_key_len,
enum ha_rkey_function end_search_flag);
int create(const char *name, register TABLE *form,
HA_CREATE_INFO *create_info);
int delete_table(const char *name);
THR_LOCK_DATA **store_lock(THD *thd, THR_LOCK_DATA **to,
enum thr_lock_type lock_type);
void update_auto_primary_key();
inline void get_auto_primary_key(byte *to)
{
ulonglong tmp;
pthread_mutex_lock(&share->mutex);
share->auto_ident++;
int5store(to,share->auto_ident);
pthread_mutex_unlock(&share->mutex);
}
};
extern bool berkeley_skip;
extern u_int32_t berkeley_init_flags,berkeley_lock_type,berkeley_lock_types[];
extern ulong berkeley_cache_size, berkeley_lock_max;
extern char *berkeley_home, *berkeley_tmpdir, *berkeley_logdir;
extern long berkeley_lock_scan_time;
extern TYPELIB berkeley_lock_typelib;
bool berkeley_init(void);
bool berkeley_end(void);
bool berkeley_flush_logs(void);
int berkeley_commit(THD *thd, void *trans);
int berkeley_rollback(THD *thd, void *trans);
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