Improved the error handling, when an empty result set is obtained.

js/sql.js

@@ -24,10 +24,18 @@ $(document).ready(function() {
         $(this).append('<input type="hidden" name="ajax_request" value="true" />');
 
         $.post($(this).attr('action'), $(this).serialize() , function(data) {
+            if(data.success == true) {
+                PMA_ajaxShowMessage(data.message);
+            }
+            else if (data.success == false ) {
+                PMA_ajaxShowMessage(data.error);
+            }
+            else {
                 $("#sqlqueryresults").html(data);
                 if($("#togglequerybox").siblings(":visible").length > 0) {
                 $("#togglequerybox").trigger('click');
                 }
+            }
         })
     }) // end SQL Query submit