View difference between Paste ID: JhyvFhAS and e8AqvjuA

 pool.getConnectionAsync().then(function(connection) {
     //Use `connection` to do query
     connection.queryAsync("SELECT * FROM table").spread(function(rows, fields){
         //Handle successful query
     })
-    .catch(function(){
+    .catch(function(e) {
         //Handle error
     })
         //In either case, release connection
     .finally(function(){
         connection.release();
     })
 });