added empty query checks

helper.go

@@ -21,6 +21,19 @@ func checkFields(s []string, val string) error {
 	return nil
 }
 
+func clearFields(s string) []string {
+	a := strings.Split(s, " ")
+	b := make([]string, len(a))
+	c := 0
+	for _, v := range a {
+		if v != "" {
+			b[c] = v
+			c++
+		}
+	}
+	return b[:c]
+}
+
 type less func(i, j int) bool
 
 func reverse(f less) less {