Description: ------------ The return from MDB2_Driver_Common::query() is a variable named $resource. Calling the method with the $result_class parameter set to false indicates one wants to get a raw resource (or mysqli_result) object returned. But changes to variable names in revision 288591 (addressing Bug #16508) produces a state where $result has not been set. Along the same lines, the intention behind the $result_wrap_class parameter and the setOption("result_wrap_class") is to have the MDB2_Result_Common derived class passed into the Iterator derived result_wrap_class. But the code's existing logic can produce a state where "new $result_wrap_class($result)" would have $result not being set, too. This is interrelated with Bug #18978 (as well as Bug #16508, mentioned above).

ATTENTION: In the first sentence of the initial comment, I meant to say: "The return from MDB2_Driver_Common::_wrapQuery() is a variable named $resource."

Fix committed in r321266.