int mi_rnext_same(MI_INFO *info, uchar *buf)
{
int error;
uint inx,not_used[2];
MI_KEYDEF *keyinfo;
DBUG_ENTER("mi_rnext_same");
if ((int) (inx=info->lastinx) < 0 || info->lastpos == HA_OFFSET_ERROR)
{
set_my_errno(HA_ERR_WRONG_INDEX);
DBUG_RETURN(HA_ERR_WRONG_INDEX);
}
keyinfo=info->s->keyinfo+inx;
if (fast_mi_readinfo(info))
DBUG_RETURN(my_errno());
if (info->s->concurrent_insert)
mysql_rwlock_rdlock(&info->s->key_root_lock[inx]);
switch (keyinfo->key_alg)
{
case HA_KEY_ALG_RTREE:
if ((error=rtree_find_next(info,inx,
myisam_read_vec[info->last_key_func])))
{
error=1;
set_my_errno(HA_ERR_END_OF_FILE);
info->lastpos= HA_OFFSET_ERROR;
break;
}
break;
case HA_KEY_ALG_BTREE:
default:
if (info->set_rnext_same_key)
{
/* First rnext_same and lastkey is filled in mi_rkey */
memcpy(info->rnext_same_key, info->lastkey, info->last_rkey_length);
info->set_rnext_same_key= FALSE;
}
for (;;)
{
if ((error=_mi_search_next(info,keyinfo,info->lastkey,
info->lastkey_length,SEARCH_BIGGER,
info->s->state.key_root[inx])))
break;
if (ha_key_cmp(keyinfo->seg, info->lastkey, info->rnext_same_key,
info->last_rkey_length, SEARCH_FIND, not_used))
{
error=1;
set_my_errno(HA_ERR_END_OF_FILE);
info->lastpos= HA_OFFSET_ERROR;
break;
}
/* Skip rows that are inserted by other threads since we got a lock */
if (info->lastpos < info->state->data_file_length &&
(!info->index_cond_func || mi_check_index_cond(info, inx, buf)))
break;
}
}
if (info->s->concurrent_insert)
mysql_rwlock_unlock(&info->s->key_root_lock[inx]);
/* Don't clear if database-changed */
info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
info->update|= HA_STATE_NEXT_FOUND;
if (error)
{
if (my_errno() == HA_ERR_KEY_NOT_FOUND)
set_my_errno(HA_ERR_END_OF_FILE);
}
else if (!buf)
{
DBUG_RETURN(info->lastpos==HA_OFFSET_ERROR ? my_errno() : 0);
}
else if (!(*info->read_record)(info,info->lastpos,buf))
{
info->update|= HA_STATE_AKTIV; /* Record is read */
DBUG_RETURN(0);
}
DBUG_RETURN(my_errno());
} /* mi_rnext_same */
int mi_rnext_same(MI_INFO *info, byte *buf)
{
int error;
uint inx,not_used[2];
MI_KEYDEF *keyinfo;
DBUG_ENTER("mi_rnext_same");
if ((int) (inx=info->lastinx) < 0 || info->lastpos == HA_OFFSET_ERROR)
DBUG_RETURN(my_errno=HA_ERR_WRONG_INDEX);
keyinfo=info->s->keyinfo+inx;
if (fast_mi_readinfo(info))
DBUG_RETURN(my_errno);
if (info->s->concurrent_insert)
rw_rdlock(&info->s->key_root_lock[inx]);
switch (keyinfo->key_alg)
{
#ifdef HAVE_RTREE_KEYS
case HA_KEY_ALG_RTREE:
if ((error=rtree_find_next(info,inx,
myisam_read_vec[info->last_key_func])))
{
error=1;
my_errno=HA_ERR_END_OF_FILE;
info->lastpos= HA_OFFSET_ERROR;
break;
}
break;
#endif
case HA_KEY_ALG_BTREE:
default:
if (!(info->update & HA_STATE_RNEXT_SAME))
{
/* First rnext_same; Store old key */
memcpy(info->lastkey2,info->lastkey,info->last_rkey_length);
}
for (;;)
{
if ((error=_mi_search_next(info,keyinfo,info->lastkey,
info->lastkey_length,SEARCH_BIGGER,
info->s->state.key_root[inx])))
break;
if (ha_key_cmp(keyinfo->seg, info->lastkey, info->lastkey2,
info->last_rkey_length, SEARCH_FIND, not_used))
{
error=1;
my_errno=HA_ERR_END_OF_FILE;
info->lastpos= HA_OFFSET_ERROR;
break;
}
/* Skip rows that are inserted by other threads since we got a lock */
if (info->lastpos < info->state->data_file_length)
break;
}
}
if (info->s->concurrent_insert)
rw_unlock(&info->s->key_root_lock[inx]);
/* Don't clear if database-changed */
info->update&= (HA_STATE_CHANGED | HA_STATE_ROW_CHANGED);
info->update|= HA_STATE_NEXT_FOUND | HA_STATE_RNEXT_SAME;
if (error)
{
if (my_errno == HA_ERR_KEY_NOT_FOUND)
my_errno=HA_ERR_END_OF_FILE;
}
else if (!buf)
{
DBUG_RETURN(info->lastpos==HA_OFFSET_ERROR ? my_errno : 0);
}
else if (!(*info->read_record)(info,info->lastpos,buf))
{
info->update|= HA_STATE_AKTIV; /* Record is read */
DBUG_RETURN(0);
}
DBUG_RETURN(my_errno);
} /* mi_rnext_same */