Reset decoder in epgsql_cmd_squery state

src/commands/epgsql_cmd_squery.erl

@@ -32,7 +32,7 @@
 -record(squery,
         {query :: iodata(),
          columns = [],
-         decoder}).
+         decoder = undefined :: epgsql_wire:row_decoder() | undefined}).
 
 init(Sql) ->
     #squery{query = Sql}.
@@ -63,7 +63,8 @@ handle_message(?COMMAND_COMPLETE, Bin, Sock, #squery{columns = Cols} = St) ->
                  _ ->
                      {ok, Cols, Rows}
              end,
-    {add_result, Result, {complete, Complete}, Sock, St#squery{columns = []}};
+    {add_result, Result, {complete, Complete}, Sock, St#squery{columns = [],
+                                                               decoder = undefined}};
 handle_message(?EMPTY_QUERY, _, Sock, St) ->
     {add_result, {ok, [], []}, {complete, empty}, Sock, St};
 handle_message(?READY_FOR_QUERY, _Status, Sock, _State) ->