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;
}
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;
}