Trying to avoid DB Fatal error

Question

Hi guys,

 

I have a problem with the following code:

$c_info = qa_db_query_sub($c_query,$postid);
    if ($c_info != false){
        $c_blob=qa_db_read_one_assoc($c_info);      
    }

Giving this error: Reading one assoc from empty results

 I get that this happens because the info it's trying to get doesn't exist, but is there any built in function in q2a so that I can check for example mysqli_num_rows()?

 

Thanks