示例#1
0
int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag)
{
  int error=0;
  QUEUE *q= &(info->by_key);

  if (inx < (int) info->keys)
  {
    if (!is_queue_inited(q))
    {
      if (init_queue(q,info->tables, 0,
		     (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
		     queue_key_cmp,
		     info->open_tables->table->s->keyinfo[inx].seg))
	error=my_errno;
    }
    else
    {
      if (reinit_queue(q,info->tables, 0,
		       (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
		       queue_key_cmp,
		       info->open_tables->table->s->keyinfo[inx].seg))
	error=my_errno;
    }
  }
  return error;
}
示例#2
0
int _myrg_init_queue(MYRG_INFO *info,int inx,enum ha_rkey_function search_flag)
{
  int error=0;
  QUEUE *q= &(info->by_key);

  if (inx < (int) info->keys)
  {
    if (!is_queue_inited(q))
    {
      if (init_queue(q,info->tables, 0,
		     (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
		     queue_key_cmp,
		     info->open_tables->table->s->keyinfo[inx].seg))
	error=my_errno;
    }
    else
    {
      if (reinit_queue(q,info->tables, 0,
		       (myisam_readnext_vec[search_flag] == SEARCH_SMALLER),
		       queue_key_cmp,
		       info->open_tables->table->s->keyinfo[inx].seg))
	error=my_errno;
    }
  }
  else
  {
    /*
      inx may be bigger than info->keys if there are no underlying tables
      defined. In this case we should return empty result. As we check for
      underlying tables conformance when we open a table, we may not enter
      this branch with underlying table that has less keys than merge table
      have.
    */
    DBUG_ASSERT(!info->tables);
    error= my_errno= HA_ERR_END_OF_FILE;
  }
  return error;
}