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Viewing changes to storage/myisam/mi_range.c

  • Committer: Brian Aker
  • Date: 2009-02-10 00:14:40 UTC
  • Revision ID: brian@tangent.org-20090210001440-qjg8eofh3h93064b
Adding Multi-threaded Scheduler into the system.

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storage/myisam/mi_range.c
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   You should have received a copy of the GNU General Public License
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   along with this program; if not, write to the Free Software
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   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
 
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   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
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/*
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  Gives a approximated number of how many records there is between two keys.
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  Used when optimizing querries.
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 */
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#include "myisam_priv.h"
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using namespace drizzled;
 
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#include "myisamdef.h"
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static ha_rows _mi_record_pos(MI_INFO *, const unsigned char *, key_part_map,
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                              enum ha_rkey_function);
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static double _mi_search_pos(MI_INFO *,MI_KEYDEF *,unsigned char *, uint,uint,internal::my_off_t);
 
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static double _mi_search_pos(MI_INFO *,MI_KEYDEF *,unsigned char *, uint,uint,my_off_t);
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static uint32_t _mi_keynr(MI_INFO *info,MI_KEYDEF *,unsigned char *, unsigned char *,uint32_t *);
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/*
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  if (fast_mi_readinfo(info))
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    return(HA_POS_ERROR);
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  info->update&= (HA_STATE_CHANGED+HA_STATE_ROW_CHANGED);
 
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  if (info->s->concurrent_insert)
 
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    pthread_rwlock_rdlock(&info->s->key_root_lock[inx]);
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  switch(info->s->keyinfo[inx].key_alg){
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  case HA_KEY_ALG_BTREE:
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      res=HA_POS_ERROR;
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  }
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  if (info->s->concurrent_insert)
 
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    pthread_rwlock_unlock(&info->s->key_root_lock[inx]);
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  fast_mi_writeinfo(info);
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  return(res);
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static double _mi_search_pos(register MI_INFO *info,
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                             register MI_KEYDEF *keyinfo,
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                             unsigned char *key, uint32_t key_len, uint32_t nextflag,
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                             register internal::my_off_t pos)
 
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                             register my_off_t pos)
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{
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  int flag;
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  uint32_t nod_flag, keynr, max_keynr= 0;