ha_blackhole.cpp
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:4k
- /* 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; 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 USE_PRAGMA_IMPLEMENTATION
- #pragma implementation // gcc: Class implementation
- #endif
- #include "mysql_priv.h"
- #ifdef HAVE_BLACKHOLE_DB
- #include "ha_blackhole.h"
- const char **ha_blackhole::bas_ext() const
- {
- static const char *ext[]= { NullS };
- return ext;
- }
- int ha_blackhole::open(const char *name, int mode, uint test_if_locked)
- {
- DBUG_ENTER("ha_blackhole::open");
- thr_lock_init(&thr_lock);
- thr_lock_data_init(&thr_lock,&lock,NULL);
- DBUG_RETURN(0);
- }
- int ha_blackhole::close(void)
- {
- DBUG_ENTER("ha_blackhole::close");
- thr_lock_delete(&thr_lock);
- DBUG_RETURN(0);
- }
- int ha_blackhole::create(const char *name, TABLE *table_arg,
- HA_CREATE_INFO *create_info)
- {
- DBUG_ENTER("ha_blackhole::create");
- DBUG_RETURN(0);
- }
- const char *ha_blackhole::index_type(uint key_number)
- {
- DBUG_ENTER("ha_blackhole::index_type");
- DBUG_RETURN((table->key_info[key_number].flags & HA_FULLTEXT) ?
- "FULLTEXT" :
- (table->key_info[key_number].flags & HA_SPATIAL) ?
- "SPATIAL" :
- (table->key_info[key_number].algorithm == HA_KEY_ALG_RTREE) ?
- "RTREE" :
- "BTREE");
- }
- int ha_blackhole::write_row(byte * buf)
- {
- DBUG_ENTER("ha_blackhole::write_row");
- DBUG_RETURN(0);
- }
- int ha_blackhole::rnd_init(bool scan)
- {
- DBUG_ENTER("ha_blackhole::rnd_init");
- DBUG_RETURN(0);
- }
- int ha_blackhole::rnd_next(byte *buf)
- {
- DBUG_ENTER("ha_blackhole::rnd_next");
- DBUG_RETURN(HA_ERR_END_OF_FILE);
- }
- int ha_blackhole::rnd_pos(byte * buf, byte *pos)
- {
- DBUG_ENTER("ha_blackhole::rnd_pos");
- DBUG_ASSERT(0);
- DBUG_RETURN(0);
- }
- void ha_blackhole::position(const byte *record)
- {
- DBUG_ENTER("ha_blackhole::position");
- DBUG_ASSERT(0);
- DBUG_VOID_RETURN;
- }
- void ha_blackhole::info(uint flag)
- {
- DBUG_ENTER("ha_blackhole::info");
- records= 0;
- deleted= 0;
- errkey= 0;
- mean_rec_length= 0;
- data_file_length= 0;
- index_file_length= 0;
- max_data_file_length= 0;
- delete_length= 0;
- if (flag & HA_STATUS_AUTO)
- auto_increment_value= 1;
- DBUG_VOID_RETURN;
- }
- int ha_blackhole::external_lock(THD *thd, int lock_type)
- {
- DBUG_ENTER("ha_blackhole::external_lock");
- DBUG_RETURN(0);
- }
- uint ha_blackhole::lock_count(void) const
- {
- DBUG_ENTER("ha_blackhole::lock_count");
- DBUG_RETURN(0);
- }
- THR_LOCK_DATA **ha_blackhole::store_lock(THD *thd,
- THR_LOCK_DATA **to,
- enum thr_lock_type lock_type)
- {
- DBUG_ENTER("ha_blackhole::store_lock");
- DBUG_RETURN(to);
- }
- int ha_blackhole::index_read(byte * buf, const byte * key,
- uint key_len, enum ha_rkey_function find_flag)
- {
- DBUG_ENTER("ha_blackhole::index_read");
- DBUG_RETURN(0);
- }
- int ha_blackhole::index_read_idx(byte * buf, uint idx, const byte * key,
- uint key_len, enum ha_rkey_function find_flag)
- {
- DBUG_ENTER("ha_blackhole::index_read_idx");
- DBUG_RETURN(HA_ERR_END_OF_FILE);
- }
- int ha_blackhole::index_read_last(byte * buf, const byte * key, uint key_len)
- {
- DBUG_ENTER("ha_blackhole::index_read_last");
- DBUG_RETURN(HA_ERR_END_OF_FILE);
- }
- int ha_blackhole::index_next(byte * buf)
- {
- DBUG_ENTER("ha_blackhole::index_next");
- DBUG_RETURN(HA_ERR_END_OF_FILE);
- }
- int ha_blackhole::index_prev(byte * buf)
- {
- DBUG_ENTER("ha_blackhole::index_prev");
- DBUG_RETURN(HA_ERR_END_OF_FILE);
- }
- int ha_blackhole::index_first(byte * buf)
- {
- DBUG_ENTER("ha_blackhole::index_first");
- DBUG_RETURN(HA_ERR_END_OF_FILE);
- }
- int ha_blackhole::index_last(byte * buf)
- {
- DBUG_ENTER("ha_blackhole::index_last");
- DBUG_RETURN(HA_ERR_END_OF_FILE);
- }
- #endif /* HAVE_BLACKHOLE_DB */