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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 */
#ifdef USE_PRAGMA_IMPLEMENTATION
#pragma implementation // gcc: Class implementation
#endif
#include "mysql_priv.h"
#ifdef HAVE_BLACKHOLE_DB
#include "ha_blackhole.h"
/* Blackhole storage engine handlerton */
handlerton blackhole_hton= {
"BLACKHOLE",
SHOW_OPTION_YES,
"/dev/null storage engine (anything you write to it disappears)",
DB_TYPE_BLACKHOLE_DB,
NULL,
0, /* slot */
0, /* savepoint size. */
NULL, /* close_connection */
NULL, /* savepoint */
NULL, /* rollback to savepoint */
NULL, /* release savepoint */
NULL, /* commit */
NULL, /* rollback */
NULL, /* prepare */
NULL, /* recover */
NULL, /* commit_by_xid */
NULL, /* rollback_by_xid */
NULL, /* create_cursor_read_view */
NULL, /* set_cursor_read_view */
NULL, /* close_cursor_read_view */
HTON_CAN_RECREATE
};
/*****************************************************************************
** BLACKHOLE tables
*****************************************************************************/
ha_blackhole::ha_blackhole(TABLE *table_arg)
:handler(&blackhole_hton, table_arg)
{}
static const char *ha_blackhole_exts[] = {
NullS
};
const char **ha_blackhole::bas_ext() const
{
return ha_blackhole_exts;
}
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;
}
int 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_RETURN(0);
}
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 */
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