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Error with mysqli handling NO resultset, not NULL resultset


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I am having an issue where the output from a MySQL stored procedure is not handled correctly, when there is NO resultset, as opposed to a NULL resultset.  For example:


1) select * from myTable; //this works, there are 0,1, multiple records returned


2) select * from myTable where 1=2;  //this works, there are 0 records returned in a NULL resultset


3)  set user_level = 'user';

     if user_level = 'admin' then

         select * from myTable;    //this never hits

     end if;    


There is an error in #3, the query is never touched, so NO resultset is returned.  This is different from what happens in example #2, where a resultset is returned, it is just NULL.


My code looks like this:


      if ( ($result = $mysqli_conn->query($SQL)) == false )
        printf("Invalid query: %s\nWhole query: %s\n", $mysqli_conn->error, $SQL);
      else {
        while ($myrow = $result->fetch_array(MYSQLI_ASSOC)) 
              ... do something here
Any thoughts on how to handle this cleanly?  Thanks all,
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